Weather HQ at Jeff's Pirates Cove, Ipan, Guam

Gentle to moderate winds are expected over the next few days. Combined seas of 5 to 6 ft will slightly decrease tonight as the longer-period northwest swell diminishes, before a slight increase in the latter half of the week due to an increasing trade-wind swell.

Wednesday

East wind 10 kt. Seas 5 to 6 ft. Wave Detail: East 5 ft at 11 seconds, northwest 4 ft at 11 seconds, and east 2 ft at 4 seconds.

Wednesday Night

East wind 10 to 15 kt. Seas 5 to 7 ft. Wave Detail: East 5 ft at 11 seconds, northwest 4 ft at 11 seconds, and east 3 ft at 4 seconds.

Thursday through Saturday

East wind 5 to 15 kt. Seas 5 to 7 ft. Wave Detail: East 6 ft at 11 seconds, northwest 2 ft at 10 seconds, and east 3 ft at 4 seconds.

5. Magnitude 4.9Pagan region, Northern Mariana Islands (opens in a new tab)Oct 20, 5:09pm. 376 miles north of Guam, 250 km deep.
6. Magnitude 5.0Pagan region, Northern Mariana Islands (opens in a new tab)Oct 20, 12:54pm. 342 miles north-northeast of Guam, 129 km deep.
7. Magnitude 4.636 km S of Inarajan Village, Guam (opens in a new tab)Oct 19, 3:28am. 35 miles south of Guam, 44 km deep.
8. Magnitude 4.2Pagan region, Northern Mariana Islands (opens in a new tab)Oct 18, 6:17pm. 362 miles north of Guam, 224 km deep.
9. Magnitude 4.6Mariana Islands region (opens in a new tab)Oct 17, 9:04pm. 231 miles east-southeast of Guam, 10 km deep.
10. Magnitude 4.9119 km SSW of Merizo Village, Guam (opens in a new tab)Oct 16, 9:57pm. 90 miles south-southwest of Guam, 10 km deep. Felt by 2 people.
11. Magnitude 4.3Mariana Islands region (opens in a new tab)Oct 16, 1:57pm. 572 miles north-northwest of Guam, 343 km deep.
12. Magnitude 4.2Mariana Islands region (opens in a new tab)Oct 15, 6:10pm. 435 miles north-northeast of Guam, 75 km deep.
13. Magnitude 4.7172 km SSW of Merizo Village, Guam (opens in a new tab)Oct 15, 3:36pm. 123 miles south-southwest of Guam, 10 km deep.
14. Magnitude 4.1Pagan region, Northern Mariana Islands (opens in a new tab)Oct 14, 6:07am. 383 miles north-northeast of Guam, 116 km deep.
15. Magnitude 4.539 km NE of Yigo Village, Guam (opens in a new tab)Oct 12, 5:44am. 34 miles northeast of Guam, 72 km deep.
16. Magnitude 4.3Volcano Islands, Japan region (opens in a new tab)Oct 12, 3:06am. 609 miles north of Guam, 110 km deep.
17. Magnitude 4.2Mariana Islands region (opens in a new tab)Oct 11, 3:13pm. 579 miles north-northwest of Guam, 305 km deep.
18. Magnitude 4.144 km ENE of Yigo Village, Guam (opens in a new tab)Oct 10, 2:04pm. 36 miles northeast of Guam, 112 km deep. Felt by 6 people.
19. Magnitude 5.340 km NE of Yigo Village, Guam (opens in a new tab)Oct 10, 1:58pm. 34 miles northeast of Guam, 111 km deep. Felt by 40 people.
20. Magnitude 4.2140 km E of Saipan, Northern Mariana Islands (opens in a new tab)Oct 7, 1:21pm. 184 miles northeast of Guam, 10 km deep.
21. Magnitude 4.1253 km N of Saipan, Northern Mariana Islands (opens in a new tab)Oct 7, 12:20pm. 287 miles north-northeast of Guam, 192 km deep.
22. Magnitude 4.8State of Yap, Federated States of Micronesia (opens in a new tab)Oct 6, 2:40pm. 463 miles south of Guam, 10 km deep.
23. Magnitude 5.0183 km ENE of Saipan, Northern Mariana Islands (opens in a new tab)Oct 5, 8:52pm. 237 miles northeast of Guam, 10 km deep.
24. Magnitude 4.075 km NNE of Saipan, Northern Mariana Islands (opens in a new tab)Oct 5, 4:26am. 185 miles north-northeast of Guam, 126 km deep.
25. Magnitude 4.7221 km NNE of Colonia, Micronesia (opens in a new tab)Oct 4, 3:57pm. 414 miles west-southwest of Guam, 10 km deep.

Area Forecast Discussion...UPDATED National Weather Service Tiyan GU 733 AM ChST Tue Nov 3 2026 Updated Western Micronesia section to include the High Surf Advisory in effect for Palau. .Marianas Update... The area of thunderstorms that moved across Saipan and Tinian waters yesterday afternoon persisted late into the evening, dissipating overnight as the nearby surface trough, and weak upper-level support, shifted west of the area. Satellite and radar imagery this morning show isolated showers drifting slowly northwest across Marianas coastal waters, pulled along by the inflow into the eastern flank of Typhoon In-fa to the north-northwest. Partly cloudy skies and isolated showers are expected to continue through the next few days within the drier trade-wind regime behind Typhoon In-fa. Showers may see an increase around Friday night and Saturday, as models depict a robust trade-wind trough crossing the islands. The High Surf Advisory and High Rip Current Risk for north-facing reefs expired earlier this morning, as the diminishing northwest swell from In-fa has allowed the surf to fall below hazardous levels, and the high rip current risk to fall to moderate. A moderate risk of rip currents will continue along north, east, and west-facing reefs over the next few days as the east-northeast trade swell becomes dominant. Combined seas between 4 and 6 feet are expected through the rest of the week, with light to moderate easterly trade winds. && .Tropical Systems Update... Typhoon In-fa is located near 23.3N 139.7E, around 145 miles southwest of Iwo To or 755 miles north-northwest of Guam. In-fa is currently a low-end Category 1 typhoon with maximum sustained winds of 75 mph. It is anticipated to strengthen slightly through tonight as it continues slowly northwest, then north, later passing to the west of Iwo To around mid-day Wednesday. For more information on Typhoon In-fa, please refer to bulletins from the Joint Typhoon Warning Center under WMO header WTPN31 PGTW and from the National Weather Service under WMO header WTPQ31 PGUM. && .Eastern Micronesia Update... A generally unsettled pattern continues, associated with the broad monsoon-like trough that extends from east to west across much of the region. Kosrae can expect scattered showers today as it sits on the edge of a robust convergence zone, with numerous showers seen to the southeast. Isolated to scattered showers are seen west and south of Pohnpei, associated with convergence into an elongated weak circulation located farther west, and low-end scattered showers were kept in the forecast for today. Relatively drier conditions are expected for Majuro today, before the trough to its east, and associated convergence, build scattered showers into the area tonight. Latest buoy and altimetry data depict combined seas of 5 to 7 feet near Majuro, associated with an elevated longer-period north- northeast swell moving into the area, and 4 to 6 feet near Pohnpei and Kosrae. Swell heights were increased accordingly in Majuro's coastal forecast, with elevated surf expected along north-facing reefs over the next few days. && .Western Micronesia Update... A broad, elongated circulation is located to the south-southwest of Chuuk, embedded within the broad monsoon-like trough that stretches across the region. The forecast was in good shape and there was little change overnight. Satellite imagery this morning shows convection developing east of Chuuk, associated with enhanced convergence along the northern periphery of the elongated circulation. Low-end scattered showers and isolated thunderstorms were continued slightly longer for Chuuk, expected to diminish to isolated showers by tonight. Meanwhile, scattered showers and isolated thunderstorms were maintained for Palau today. Satellite shows an area of patchy showers building nearby along the broader trough axis. Conditions remain dry for Yap. A High Surf Advisory was issued for north-facing reefs of Palau this morning, based on Babeldaob buoy data showing a stronger pulse of long-period north-northeast swell from Typhoon In-fa, capable of producing hazardous surf along north-facing reefs. Model guidance indicates surf may remain hazardous through tonight as the long- period swell persists, so the High Surf Advisory is in effect through 5 AM ChST Wednesday for both Palau and Yap. && .Prev discussion... /issued 547 PM ChST Mon Nov 2 2026/ Marianas Synopsis... Satellite and radar imagery show partly to mostly cloudy skies with isolated showers and thunderstorms as a convergence zone between the easterly trade wind flow and weak southwesterly flow sits over the islands and slowly drifts west. Models and observations show combined seas of 5 to 7 feet. Discussion... Some brief thunderstorms were visible today as moderate wind shear and weak upper level support developed over the convergence zone. This is moving out of the region so thunderstorms are no longer expected for the islands but may be visible off the coast tonight. Otherwise, showers are expected to remain isolated at least the next few days with occasional patches of weak, scattered trade wind showers possible. Gentle winds tonight will become gentle to moderate tomorrow and may increase slightly by the end of the week. Models indicate a trade wind trough may move into or just north of the Marianas by Friday, possibly bringing more rainfall. However, the location of this trough remains uncertain so isolated showers remain in the forecast. Marine... Light to gentle trade winds are expected through Tuesday night, becoming moderate around midweek onward. Combined seas of 5 to 7 ft are expected to continue decreasing slowly through Tuesday night before remaining steady or increasing slightly due to higher trade winds. There will be hazardous surf and a high risk of rip currents along north-facing reefs through tonight. There is also a moderate risk of rip currents along east- and west-facing reefs. Swells consist of a long period north-northwest swell from distant Typhoon In-fa and a smaller trade wind swell. The secondary northeast to east trade swell looks to become dominant by late Tuesday. Lastly, isolated thunderstorms will be possible for western coastal waters before midnight. Tropical Systems... Typhoon In-fa is located near 22.6N 141.0E based on visible imagery at 4 PM ChST. It continues moving west at 6 mph, with a decrease in forward speed expected to occur tonight or Tuesday. Maximum sustained winds of 85 mph. Typhoon force winds extend out to 45 miles, mainly on the northern side, with tropical storm force winds extending outward up to 150 miles from the center. Although some slight strengthening is possible over the next 36 to 48 hours (perhaps a 5 knot increase), in general winds look to remain near 70 knots the majority of this time, with a turn more to the northwest expected. Thereafter, for the latter half of the week, In-fa looks to rapidly accelerate northeast as it gradually weakens. For more information please refer to bulletins from the Joint Typhoon Warning Center under WMO header WTPN31 PGTW and from the National Weather Service under WMO header WTPQ31 PGUM. Eastern Micronesia... The Pohnpei buoy is showing the northwesterly swell from distant Typhoon In-fa continues to affect the region. As such, a higher northwesterly (a foot above guidance, 4 feet for swell height) was retained at Pohnpei and Kosrae for the next 36 hours, allowing it to become light by the middle of the week. Aside from that, the main forecast challenge was rainfall potential and the effect high clouds will have on temperatures the next few days. Visible imagery and streamline analysis shows a broad, weak surface circulation has formed north of Nukuoro in the FSM. This feature is located along the monsoon trough that extends east from there through Kosrae, becoming east-northeast as it passes by Majuro (just to your south), before crossing the Date Line at 9N. The trough is expected to lift north and settle between 5N and 6N (between Pohnpei and Kosrae) over the next few days as well. However, the models show Pohnpei getting dry- slotted after Tuesday, so we only carried scattered showers for tomorrow there. At Kosrae and Majuro, with the trough lingering nearby, look for scattered showers to occur from time to time for much of this week. For our mariners, seas of 4 to 6 feet will continue through Tuesday night at Pohnpei and Kosrae, and 3 to 5 feet at Majuro. Then, for the latter half of the week, seas look to decrease by a foot or so. Light to gentle winds will prevail through the week as well. Western Micronesia... A monsoon-like trough continues to produce patchy showers across the region with convection deepening along enhanced convergence south of the trough, concentrating scattered showers and isolated thunderstorms across open waters south of Yap and Chuuk State. Spotty thunderstorms are seen just northwest of Palau waters, moving southward, so have included isolated thunderstorms into the forecast tonight. Low-end scattered showers persist through Tuesday night, meanwhile relatively drier air with precipitable water amounting to around 1.8 inches has moved into the Yap, with mainly dry conditions and periods of isolated light showers through at least Wednesday. Gentle to moderate trades return Wednesday night for Yap and Friday for Palau with the overall weather pattern remaining fairly quiet and mainly isolated showers expected through late week. Weak winds and daytime heating may still bring an uptick in clouds and showers over the islands in the afternoon, Tuesday at Yap and through Wednesday at Palau. An elongated circulation embedded within the monsoon-like trough brings another round of scattered showers tonight at Chuuk, with isolated thunderstorms developing around midnight as the feature shifts westward, before weakening sometime Tuesday. Combined seas are 4 to 6 feet at Chuuk, with seas increasing to 5 to 7 ft at Yap and Palau from north to northeast swell emanating from distant Typhoon In-fa. Hazardous surf of 7 to 10 feet continue along north-facing reefs of Yap and a High Surf Advisory remains in effect through Tuesday afternoon. Surf along north-facing reefs of Palau will be elevated over the next few days, but is expected to remain just below hazardous levels of 9 feet. Seas and surf are expected to peak near Yap sometime late tonight or Tuesday, with surf possibly decreasing below hazardous levels by Tuesday night as the pulse of long-period swell diminishes. Meanwhile, benign seas and surf continue at Chuuk, comprised of a dominant northeast swell of 3 to 5 feet and a light northwest swell, gradually diminishing around midweek. && .GUM WATCHES/WARNINGS/ADVISORIES... GU...None. MP...None. Marianas Waters...None. && $$ Marianas/East and West Micronesia/Tropical Update: DeCou Marianas: Ogle East Micronesia/Tropical: Doll West Micronesia: Cruz

Surf Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 357 AM ChST Tue Nov 3 2026 .DISCUSSION... There is a moderate risk of rip currents along north, east, and west-facing reefs. Swells consist of a diminishing longer period northwest swell from distant Typhoon In-fa and an east-northeast trade-wind swell. $$ GUZ001-MPZ001>003-030900- Guam-Rota-Tinian-Saipan- 357 AM ChST Tue Nov 3 2026 ...HIGH SURF ADVISORY WILL EXPIRE AT 4 AM CHST EARLY THIS MORNING... ...HIGH RIP CURRENT RISK WILL EXPIRE AT 4 AM CHST EARLY THIS MORNING... 36 hour Surf Zone Forecast for the Marianas from 600 AM Tuesday through 600 PM Wednesday .TODAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............6 to 7 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 2 feet. West facing reefs............5 to 6 feet. Swell/Period Primary swell................Northwest at 3 to 5 feet. Primary period...............11 seconds. Secondary swell..............East at around 4 feet. Secondary period.............9 seconds. Water Temperature CDAS SST Analysis..........84 Degrees. Max Heat Index.........Around 99. Winds...............East at 10 to 15 mph. .TONIGHT... Rip Current Risk.....Moderate *. Surf Height North facing reefs............5 to 7 feet. East facing reefs............4 to 6 feet. South facing reefs............1 to 2 feet. West facing reefs............4 to 6 feet. Swell/Period Primary swell................East at 3 to 5 feet. Primary period...............10 seconds. Secondary swell..............Northwest at around 4 feet. Secondary period.............11 seconds. Winds...............East at 10 to 15 mph. .WEDNESDAY... Rip Current Risk.....Moderate *. Surf Height North facing reefs............4 to 6 feet. East facing reefs............5 to 7 feet. South facing reefs............1 to 2 feet. West facing reefs............4 to 5 feet. Swell/Period Primary swell................East at around 5 feet. Primary period...............11 seconds. Secondary swell..............Northwest at around 4 feet. Secondary period.............11 seconds. Max Heat Index.........Around 100. Winds...............East at 10 to 15 mph. Tide information for the next 36 hours... At Apra Harbor, Guam... Low tide 0.0 feet at 8:24 AM Tuesday High tide 2.2 feet at 3:56 PM Tuesday Low tide 1.1 feet at 10:00 PM Tuesday High tide 1.7 feet at 2:47 AM Wednesday Low tide 0.2 feet at 9:30 AM Wednesday High tide 2.3 feet at 4:33 PM Wednesday Low tide 0.8 feet at 10:53 PM Wednesday At Rota Island... Low tide 0.0 feet at 8:18 AM Tuesday High tide 2.1 feet at 3:53 PM Tuesday Low tide 1.0 feet at 9:54 PM Tuesday High tide 1.6 feet at 2:44 AM Wednesday Low tide 0.2 feet at 9:24 AM Wednesday High tide 2.1 feet at 4:30 PM Wednesday Low tide 0.7 feet at 10:47 PM Wednesday At Tinian Island... Low tide 0.0 feet at 8:01 AM Tuesday High tide 1.7 feet at 3:54 PM Tuesday Low tide 0.4 feet at 9:37 PM Tuesday High tide 1.3 feet at 2:45 AM Wednesday Low tide 0.1 feet at 9:07 AM Wednesday High tide 1.7 feet at 4:31 PM Wednesday Low tide 0.3 feet at 10:30 PM Wednesday At Tanapag Harbor, Saipan... Low tide 0.1 feet at 8:32 AM Tuesday High tide 2.2 feet at 4:02 PM Tuesday Low tide 1.1 feet at 10:08 PM Tuesday High tide 1.7 feet at 2:56 AM Wednesday Low tide 0.3 feet at 9:37 AM Wednesday High tide 2.2 feet at 4:37 PM Wednesday Low tide 0.8 feet at 10:53 PM Wednesday * Low Risk of rip currents - Strong currents can still occur near jetties and reef channels. Always have a flotation device with you in the water. Moderate Risk of rip currents - Wave conditions support stronger or more frequent rip currents. Always have a flotation device with you in the water. High Risk of rip currents - Large waves will produce strong rip currents, especially along narrow reefs and beaches. Rip currents will be life threatening. If caught in a rip current, swim parallel to the beach rather than against the current. $$

BULLETIN...CORRECTED Typhoon In-fa (30W) Advisory Number 43 National Weather Service Tiyan GU WP302026 121 PM ChST Tue Nov 3 2026 ...TYPHOON IN-FA MOVING WEST, AWAY FROM IWO TO... CHANGES WITH THIS ADVISORY -------------------------- None. WATCHES AND WARNINGS -------------------- None. SUMMARY OF 100 PM CHST...0300 UTC...INFORMATION ----------------------------------------------- Location...23.2N 139.1E About 175 miles southwest of Iwo To About 520 miles northwest of Agrihan About 555 miles northwest of Pagan About 580 miles northwest of Alamagan About 705 miles northwest of Saipan About 765 miles north-northwest of Guam Maximum sustained winds...80 mph Present movement...west...280 degrees at 7 mph DISCUSSION AND OUTLOOK ---------------------- At 100 PM CHST...0300 UTC...the center of Typhoon In-fa was located near Latitude 23.2 degrees North and Longitude 139.1 degrees East. In-fa is moving west at 7 mph. It is expected to make a turn toward the north-northwest with little change in forward speed through Wednesday, as it continues across the open Pacific. Maximum sustained winds have increased to 80 mph. In-fa is forecast to intensify through tonight. Typhoon force winds extend outward from the center up to 35 miles to the north and up to 0 miles to the south. Tropical storm force winds extend outward from the center up to 115 miles. NEXT ADVISORY ------------- The next scheduled advisory will be issued by the National Weather Service at 800 PM ChST. $$ Doll