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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0:000:29
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North-facing shores on Oʻahu will see the largest surf today through Friday, with six to eight feet possible Friday morning. South-facing shores will reach five to seven feet Friday, while east-facing shores remain one to three feet. A larger swell arriving around Tuesday will boost north and west shore surf toward advisory thresholds. Check posted signs and ask lifeguards before entering the water, especially on north-facing exposures.
0:000:37
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South swell continues through next week with reinforcing pulses Thursday and Saturday. South-facing shores show the largest surf at five to seven feet today and Friday, remaining a few feet below advisory levels. North-facing shores will see four to six feet today, with a larger swell arriving around Tuesday to boost north and west shore surf to just below advisory thresholds. West and east-facing shores have lower surf in the table. Check posted signs and ask lifeguards before entering the water, especially on south-facing exposures.
0:000:36
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South swell will continue into next week with pulses of long period reinforcement arriving Thursday and Saturday. South-facing shores on the Big Island will see five to seven feet through Friday—below advisory levels. North-facing shores hold three to five feet with small to moderate surf continuing. A larger swell will arrive around Tuesday, boosting north and west shores to just below advisory thresholds. East-facing shores remain small with weak local winds. Check posted signs and ask lifeguards before entering, especially on south-facing exposures.
0:000:42
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North facing shores on Kauaʻi will see six to eight foot surf today and Friday. South facing shores show four to six feet today, then three to five feet Friday, rising to five to seven feet. West facing shores hold five to seven feet. East facing shores remain one to three feet. Small to moderate surf continues through the week as a surface low reinforces swell energy. A larger swell arrives around Tuesday, boosting north and west shore surf to just below advisory thresholds. Check posted signs and ask lifeguards before entering, especially on north facing exposures.
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.
Heavy rain bands are moving across Oʻahu this morning, with rates hitting 1 to 2 inches per hour in the worst spots. A Flash Flood Watch is in effect through 6 PM today.
Showers will continue through much of the afternoon as the system moves slowly eastward. Avoid driving through flooded areas and watch for reduced visibility in heavy downpours. By Friday conditions improve significantly—showers drop to scattered, isolated afternoon ones mainly on the neighbor islands. Humidity stays high through Friday but normalizes by Saturday.
Plan indoor activities or windward drives for Friday when the heavy rain moves out.
0:000:48
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Heavy rain bands are moving slowly eastward this morning, with rates reaching 1–2 inches per hour in the worst spots on Kauai and Oahu. Maui sees scattered showers mainly in the afternoon.
By Friday, showers become isolated and drop to the Big Island and Maui. Humidity stays elevated through Friday, then drops by Saturday. Moderate trade winds return over the weekend. Surf stays below warning levels—south-facing shores will see a few feet of swell through next week, while north and west shores remain modest. A larger swell may arrive around Tuesday.
If you're planning an afternoon outing, check conditions on the windward side before heading out—isolated showers are possible there.
0:000:44
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Heavy rain is moving slowly eastward across Kauai and Oahu this morning, with rates hitting 1–2 inches per hour in the worst spots. On the Big Island, expect scattered showers and isolated afternoon downpours.
By Friday, showers ease to scattered and isolated. Moderate trade winds return over the weekend. Humidity stays elevated through Friday, then drops to normal by Saturday. Surf stays below warning levels—south-facing shores will see a few feet of swell through next week, with a larger swell possible around Tuesday.
Plan outdoor activities for the morning when rain is lighter, and check conditions before heading out in the afternoon.
0:000:39
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Heavy rain bands are pushing slowly eastward across Kauaʻi this morning, with rates hitting 1–2 inches per hour in the heaviest spots. A Flash Flood Watch is in effect through 6 PM today.
The flooding threat will ease by late morning as drier air moves in. Visibility drops in heavy showers, so drive carefully if you're out. By Friday, showers drop to scattered and isolated afternoon downpours. Weekend brings moderate trade winds and typical summer conditions back.
Plan outdoor activities for late morning onward, once the heavy rain clears Kauaʻi.
Created with AI from the official NWS forecast discussion · verify with NWS before heading out
