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Avalanche surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 7 am Thursday 21 May 2026 HSTForecast update in hr min s Forecast update imminent
Avalanche surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Avalanche sea temperature is
25.6° C
(Which is normal for this time of year)How big are the waves at Avalanche today?
The current surf forecast for Avalanche at 3PM is: 0.4m 10s primary swell from a Northwest direction (forecast issued at 07:00am May 21). An open ocean swell of 0.4m 15s is not directed at the surf break, a second open ocean swell of 0.4m 16s 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 cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.4m) | 10s |
| Afternoon (21 May) | 1.5ft (0.4m) | 10s |
| Evening (21 May) | 1.5ft (0.4m) | 10s |
Table - waves today at Avalanche. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 24°C on Thu morning, 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 |    |    |    |    | ||||||||||||||||||||
NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NNW 10 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 7 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | |
33 | 38 | 24 | 24 | 24 | 18 | 322 | 322 | 260 | 247 | 264 | 277 | 346 | 337 | 299 | 270 | 284 | 291 | 378 | 457 | 443 | 367 | 343 | 313 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | |
High Tide | 7:31AM0.11m | 7:36PM0.48m | 9:08AM0.16m | 8:32PM0.43m | 10:27AM0.22m | 9:26PM0.37m | ||||||||||||||||||
Low Tide | 10:46AM0.04m | 2:21AM-0.00m | 12:11PM0.09m | 3:02AM-0.01m | 1:55PM0.14m | |||||||||||||||||||
 |  | |  | |  |  | | | | | | | | | | | |  | | | | | | |
 | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | 5:50 |
 | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:07 | — | — | — | — | — | — | — | 7:07 | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 23 | 23 | 22 |
20 | 19 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 19 | 20 | 19 | 18 | 18 | 19 | 19 | 20 | 19 | |
Swell 1 Height (m) Direction Period (s) | SSW 13 | S 16 | S 16 | SSW 14 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | NW 11 | NW 11 | S 16 | S 16 | S 16 | S 16 | S 16 | S 15 | NW 14 | NW 14 | NE 8 |
 kJ | 102 | 134 | 134 | 66 | 127 | 174 | 157 | 157 | 157 | 110 | 109 | 103 | 94 | 57 | 57 | 188 | 185 | 127 | 125 | 242 | 215 | 211 | 194 | 313 |
Swell 2 Height (m) Direction Period (s) | S 16 | SSW 13 | SSW 13 | SSW 16 | NW 10 | NNW 10 | NW 10 | SE 13 | SE 12 | SSE 12 | NNW 10 | NNW 11 | NW 11 | S 14 | S 17 | NW 11 | NW 10 | NW 10 | NNW 16 | NNW 16 | NNW 15 | S 15 | S 15 | NW 13 |
| kJ | 135 | 69 | 60 | 87 | 24 | 18 | 23 | 42 | 39 | 58 | 41 | 45 | 57 | 93 | 143 | 56 | 54 | 51 | 102 | 164 | 191 | 212 | 155 | 180 |
Swell 3 Height (m) Direction Period (s) | NNW 10 | NNW 10 | NW 10 | NW 10 | SSW 12 | SSE 13 | SSE 13 | NW 10 | NW 10 | NW 10 | S 18 | S 18 | S 18 | S 18 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NW 10 | S 15 |
| kJ | 33 | 38 | 24 | 24 | 28 | 33 | 33 | 25 | 25 | 25 | 57 | 98 | 98 | 97 | 60 | 60 | 58 | 58 | 40 | 40 | 39 | 39 | 25 | 155 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 7 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | NE 8 | ENE 8 |
| kJ | 247 | 274 | 274 | 274 | 318 | 339 | 322 | 322 | 260 | 247 | 264 | 277 | 346 | 337 | 299 | 270 | 284 | 291 | 378 | 457 | 443 | 367 | 343 | 385 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 169 | 168 | 169 | 168 | 171 | 303 | 295 | 163 | 16 | 16 | 163 | 165 | 163 | 163 | 16 | 165 | 169 | 163 | 163 | 163 | 171 | 163 | 16 | 14 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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