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Surf Forecasts:
Aligator Rock surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 pm Monday 18 May 2026 HSTForecast update in hr min s Forecast update imminent
Aligator Rock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Aligator Rock sea temperature is
25.4° C
(Which is normal for this time of year)How big are the waves at Aligator Rock today?
The current surf forecast for Aligator Rock at 2AM is: 0.4m 11s primary swell from a Northwest direction (forecast issued at 07:00pm May 18). An open ocean swell of 0.4m 14s is not directed at the surf break, a second open ocean swell of 1.6m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 2ft (0.6m) | 11s |
| Afternoon (19 May) | 2ft (0.6m) | 11s |
| Evening (19 May) | 2ft (0.6m) | 11s |
Table - waves today at Aligator Rock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 25°C on Tue morning, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NNW 11 | NW 11 | NNW 11 | NW 10 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 10 | NW 10 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | |
38 | 37 | 67 | 43 | 59 | 82 | 104 | 82 | 89 | 92 | 115 | 108 | 104 | 67 | 47 | 90 | 97 | 73 | 63 | 41 | 33 | 37 | 24 | 24 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | |
High Tide | 4:52PM0.60m | 4:46AM0.09m | 5:44PM0.57m | 6:00AM0.09m | 6:40PM0.53m | 7:31AM0.11m | ||||||||||||||||||
Low Tide | 11:31PM0.00m | 8:49AM-0.05m | 00:33AM0.00m | 9:42AM-0.02m | 1:31AM0.00m | 10:46AM0.04m | ||||||||||||||||||
 |  | | | |  | | | | | | | | | | | | | |  | | | | | |
 | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — |
 | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | 7:06 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 24 | 24 | 23 | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 |
24 | 24 | 24 | 23 | 24 | 24 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 23 | 22 | 21 | 22 | 20 | 20 | 19 | 19 | 19 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NNW 11 | NW 11 | NNW 11 | NW 10 | NW 11 | NW 11 | NW 10 | NW 10 | NNW 10 | NW 10 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 |
 kJ | 38 | 37 | 67 | 43 | 59 | 82 | 104 | 82 | 89 | 92 | 115 | 108 | 104 | 67 | 47 | 90 | 97 | 73 | 63 | 41 | 33 | 37 | 24 | 24 |
Swell 2 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 14 | SW 18 | SSW 18 | SW 13 | SSW 16 | SSW 15 | SSW 15 | SW 16 | SW 16 | NNW 11 | SSW 16 | SSW 16 | SSW 13 | NW 9 | NW 9 | WNW 9 | SSW 13 | SSW 14 | SSW 14 |
| kJ | 49 | 48 | 47 | 46 | 47 | 48 | 79 | 30 | 27 | 24 | 21 | 44 | 64 | 64 | 43 | 50 | 50 | 18 | 13 | 12 | 8 | 16 | 20 | 20 |
Swell 3 Height (m) Direction Period (s) | SSW 19 | NNW 8 | NNW 8 | NNW 13 | SSW 18 | SW 18 | SW 13 | SW 13 | SSW 18 | SSW 13 | NNW 13 | SW 16 | SW 13 | NNW 12 | SW 16 | NW 10 | SW 13 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 16 | S 16 | S 16 |
| kJ | 37 | 7 | 7 | 17 | 30 | 79 | 28 | 27 | 30 | 17 | 17 | 10 | 7 | 28 | 64 | 14 | 7 | 20 | 20 | 16 | 17 | 20 | 20 | 5 |
Wind waves Height (m) Direction Period (s) | E 8 | ENE 8 | E 8 | E 8 | E 8 | E 8 | E 7 | E 8 | E 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 464 | 427 | 374 | 333 | 333 | 324 | 315 | 308 | 324 | 365 | 374 | 383 | 402 | 565 | 603 | 701 | 766 | 785 | 785 | 766 | 850 | 871 | 893 | 889 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 20 | 20 | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 20 | 22 | 22 | 22 | 22 | 22 | 165 | 168 | 22 | 169 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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