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Surf Forecasts:
Power Plant surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 am Thursday 21 May 2026 HSTForecast update in hr min s Forecast update imminent
Power Plant surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Power Plant sea temperature is
25.8° C
(Which is slightly warmer than usual)How big are the waves at Power Plant today?
The current surf forecast for Power Plant at 3PM is: 0.5m 16s primary swell from a South direction and 0.4m 13s secondary swell from a Southeast direction (forecast issued at 07:00am May 21). An open ocean swell of 2.3m 8s is not directed at the surf break. The wind direction is predicted to be offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.5m) | 16s |
| Afternoon (21 May) | 1.5ft (0.5m) | 16s |
| Evening (21 May) | 2ft (0.6m) | 15s |
Table - waves today at Power Plant. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 25°C on Thu afternoon, min 22°C on Sat night). Mainly fresh winds. | ||||||||||||||||||||||||
Thursday 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | 2 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
S 16 | S 16 | S 16 | S 16 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 18 | S 18 | S 18 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | |
135 | 134 | 134 | 131 | 126 | 172 | 157 | 157 | 157 | 109 | 107 | 98 | 97 | 97 | 138 | 188 | 183 | 183 | 181 | 236 | 215 | 212 | 157 | 155 | |
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 | 8:01AM0.20m | 8:22PM0.66m | 10:01AM0.25m | 9:15PM0.60m | 11:31AM0.34m | 10:06PM0.53m | ||||||||||||||||||
Low Tide | 3:42AM0.13m | 12:10PM0.14m | 4:27AM0.12m | 1:30PM0.22m | 5:03AM0.11m | 3:27PM0.28m | ||||||||||||||||||
 |  |  | | | | | | | | | | | |  | |  | | | | | | | | |
 | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | 5:50 |
 | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 |
19 | 19 | 20 | 21 | 20 | 19 | 19 | 19 | 19 | 19 | 20 | 21 | 19 | 19 | 20 | 20 | 20 | 19 | 18 | 19 | 19 | 19 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | SSW 13 | S 16 | S 16 | S 16 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | S 17 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | NNW 14 | NW 13 |
 kJ | 102 | 134 | 134 | 131 | 126 | 172 | 157 | 157 | 157 | 109 | 107 | 98 | 93 | 93 | 138 | 188 | 183 | 183 | 181 | 236 | 215 | 212 | 175 | 183 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 13 | SSW 13 | SE 13 | SE 13 | SE 13 | SE 13 | SSE 13 | SE 12 | SE 12 | SE 12 | S 18 | S 18 | NNW 11 | NNW 11 | S 13 | NNW 10 | NNW 10 | NNW 10 | NNW 16 | NNW 15 | NNW 14 | S 15 | S 15 |
| kJ | 135 | 69 | 60 | 44 | 44 | 43 | 42 | 62 | 39 | 37 | 37 | 98 | 97 | 46 | 46 | 90 | 43 | 42 | 41 | 142 | 146 | 186 | 157 | 155 |
Swell 3 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NNW 11 | NNW 11 | S 18 | SSW 13 | NNW 11 | SSW 13 | SSW 13 | NNW 16 | NW 10 | NW 10 | NW 10 | NW 10 | NW 10 |
| kJ | 38 | 38 | 24 | 19 | 18 | 18 | 18 | 19 | 25 | 25 | 27 | 45 | 46 | 97 | 60 | 45 | 58 | 58 | 103 | 26 | 26 | 25 | 25 | 24 |
Wind waves Height (m) Direction Period (s) | E 8 | E 8 | E 8 | E 8 | E 8 | E 8 | E 9 | E 9 | E 9 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 709 | 666 | 659 | 727 | 809 | 839 | 715 | 653 | 593 | 579 | 534 | 629 | 578 | 600 | 523 | 521 | 521 | 460 | 561 | 634 | 612 | 512 | 457 | 385 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 160 | 158 | 160 | 158 | 161 | 286 | 279 | 158 | 19 | 15 | 170 | 172 | 170 | 170 | 19 | 158 | 160 | 160 | 161 | 170 | 161 | 158 | 19 | 8 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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