Live NWS surf forecasts and NOAA tides and water temperature, plus a lunar-cycle Box Jellyfish Watch.
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Today’s Ocean Brief
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0:000:39
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No ocean alerts are active for Oʻahu. East and south-facing shores show the largest forecast surf tonight at 4–6 feet, dropping to 3–5 feet on south-facing shores by Tuesday while east-facing shores hold steady. West and north-facing shores remain smaller. A small, medium-period north-northwest swell may bring a bump to north-facing shores Tuesday into Wednesday. A small, long-period west-northwest swell will build locally Friday into next weekend, potentially increasing surf along north and west exposures. Check posted signs and ask lifeguards before entering, especially on east and south-facing shores.
0:000:35
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East-facing shores on Maui will see four to six feet through tonight and Tuesday. South-facing shores show three to five feet by Tuesday. North-facing shores remain flat to tiny through tonight, then see a bump Tuesday into Wednesday as a small, medium-period north-northwest swell fills in. Later this week, a long-period west-northwest swell from Typhoon Dujuan will build Friday into next weekend, increasing surf along north and west shores. Check posted signs and ask lifeguards before entering, especially on east-facing exposures.
0:000:38
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East facing shores on the Big Island will hold four to six feet through Tuesday, the largest surf in the forecast. South facing shores will run four to six feet tonight, then three to five feet by Tuesday. West facing shores will maintain two to four feet. North facing shores will remain flat to tiny tonight, then increase to two to four feet by Tuesday as a medium-period north-northwest swell fills in. Check posted signs and ask lifeguards before entering the water, especially on east facing exposures.
0:000:36
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East-facing shores on Kauaʻi will see the largest forecast surf through Tuesday—four to six feet tonight and four to six feet Tuesday. South-facing shores also reach four to six feet tonight, dropping to three to five feet by Tuesday. North-facing shores remain flat to tiny tonight, building to two to four feet Tuesday as a small, medium-period north-northwest swell fills in. West-facing shores hold steady at two to four feet. Check posted signs and ask lifeguards before entering, especially on the east-facing exposure.
Created with AI from the official NWS Honolulu Surf Forecast and active ocean alerts
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Box jellyfish arrivals tend to follow a lunar pattern on south-facing beaches. This calendar uses a cautious planning buffer around the Waikīkī Aquarium's expected window; check its current calendar, posted beach signs, and lifeguards before entering the water.
Dates are calculated from the lunar cycle. Beach conditions and sightings vary, so always follow posted signs and lifeguard instructions.
Ocean Safety
Check Before You Go
Hawaii's ocean conditions change fast. Always check the posted warning signs and color-coded warning flags at the beach. If lifeguards are present, ask them about current conditions before entering the water.
Shore Break
Waves that break directly on the sand can slam you into the bottom. Common at Sandy Beach (Oahu), Big Beach (Maui), and Hapuna Beach (Big Island). If waves are overhead and breaking on shore, stay out.
Rip Currents
If caught in a rip current, don't fight it. Swim parallel to shore until you're out of the pull, then swim back in. Look for channels of choppy, discolored water flowing seaward.
Seasonal Swells
North shores generally see their largest surf in winter, while south shores pick up Southern Hemisphere swells during the warmer months. Conditions that look calm from shore can be dangerous in the water.
Trades are breezy right now with scattered showers on the windward side and mountains; the leeward coast stays mostly dry. Tomorrow stays breezy with the same pattern.
A tropical disturbance southeast of the islands is likely to become a tropical storm by mid-week and approach the state Thursday through Saturday. The exact track is still uncertain. If it comes closer, expect heavier rain over a longer stretch; if it stays farther out, impacts will be shorter and lighter. Winds will increase late this week, with potential gusts over 70 miles per hour on the highest summits.
Plan your leeward beach time and snorkeling for today through Tuesday. Save summit drives and offshore water sports for after Saturday, and check updates daily as this develops.
0:000:53
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Trade winds are pushing across Maui right now and staying breezy through tomorrow. Windward slopes and peaks will see scattered showers; the leeward side stays mostly dry. Rough seas mean a Small Craft Advisory is in effect through Tuesday evening.
A tropical disturbance southeast of the islands is likely to become a tropical storm by mid-week and approach the state Thursday through Saturday. The track remains uncertain. Late this week, winds will increase across Maui, with summit gusts potentially exceeding 70 mph on Haleakala. The Big Island—especially Hilo and Puna—faces the highest risk of heavy rain and flooding if the storm tracks close.
Leeward beaches and snorkeling work best today through Tuesday. Avoid summit hikes and offshore water sports Thursday through Saturday.
0:000:55
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Trades are kicking today with moderate wind and rough seas. Windward slopes will see scattered showers; the leeward side stays mostly dry. A Small Craft Advisory is in effect through Tuesday evening.
A tropical disturbance southeast of the islands is likely to become a tropical storm by mid-week and approach the state Thursday through Saturday. The track remains uncertain, but the Big Island faces the highest risk of heavy rain and flooding, especially in the Hilo and Puna areas. Summit winds could exceed 70 mph late in the week. Check forecasts daily as the situation develops.
Leeward snorkeling and beach time work well through Tuesday. Save summit drives and windward hikes for today or tomorrow, and avoid offshore water sports and high elevations Thursday through Saturday.
0:000:58
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Trades are steady now with scattered showers on the windward side and ridges; the leeward coast stays mostly dry. Through Tuesday it stays breezy with rough seas around Maui and the Big Island, where a Small Craft Advisory is in effect through Tuesday evening.
A tropical disturbance southeast of the islands is likely to become a tropical storm by mid-week and approach the state Thursday through Saturday. The exact track is uncertain. Winds will increase across the eastern islands late this week, with potential for summit gusts over 70 mph on Maui and the Big Island if the storm intensifies.
Get your beach and snorkel time in today and tomorrow on the leeward coast. Avoid summit hikes and offshore water sports Thursday through Saturday as conditions deteriorate. The track could shift significantly—check updates daily.
Created with AI from the official NWS forecast discussion · verify with NWS before heading out
