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Avalanche surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Tuesday 19 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
25.4° C
(Which is normal for this time of year)How big are the waves at Avalanche today?
The current surf forecast for Avalanche at 8PM is: 0.6m 11s primary swell from a North-northwest direction and 0.9m 6s secondary swell from a Northeast direction (forecast issued at 01:00pm May 19). An open ocean swell of 0.8m 15s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 2.5ft (0.7m) | 6s |
| Afternoon (19 May) | 2ft (0.6m) | 11s |
| Evening (19 May) | 2ft (0.6m) | 11s |
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 26°C on Tue afternoon, min 23°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||||||
Tue 19 | Wednesday 20 | Thursday 21 | Fri 22 | |||||||||||||||||||||
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 | 5 AM | 8 AM | |
Swell Height Map |    |    |    |    | ||||||||||||||||||||
NE 6 | NNW 12 | NNW 10 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NW 10 | NW 10 | NW 10 | NNW 10 | NW 10 | NE 8 | NE 8 | NE 8 | |
38 | 90 | 73 | 76 | 76 | 97 | 92 | 67 | 69 | 95 | 75 | 64 | 64 | 41 | 33 | 38 | 24 | 24 | 24 | 18 | 23 | 322 | 299 | 270 | |
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 | 5:44PM0.57m | 6:00AM0.09m | 6:40PM0.53m | 7:31AM0.11m | 7:36PM0.48m | |||||||||||||||||||
Low Tide | 8:49AM-0.05m | 00:33AM0.00m | 9:42AM-0.02m | 1:31AM0.00m | 10:46AM0.04m | 2:21AM-0.00m | ||||||||||||||||||
 |  | |  |  | | |  | | | | | | | | | | | | |  | | | | |
 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | 7:07 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 |
26 | 26 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | 22 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 20 | 19 | 20 | |
Swell 1 Height (m) Direction Period (s) | NE 6 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | NNW 10 | NNW 11 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | S 16 | S 16 | SSW 16 | S 16 | SSW 15 | S 15 | S 15 | S 15 | S 15 |
 kJ | 38 | 178 | 239 | 249 | 246 | 252 | 180 | 163 | 163 | 95 | 75 | 105 | 101 | 101 | 102 | 134 | 134 | 87 | 127 | 174 | 157 | 157 | 157 | 110 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | NNW 12 | NNW 10 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SSW 14 | SSW 14 | NNW 11 | NNW 11 | NNW 10 | S 16 | SSW 13 | SSW 13 | SSW 14 | NW 10 | NNW 10 | NW 10 | SE 13 | NW 10 | NW 10 |
| kJ | 175 | 90 | 73 | 76 | 76 | 97 | 92 | 67 | 69 | 158 | 152 | 64 | 64 | 41 | 135 | 69 | 60 | 66 | 24 | 18 | 23 | 42 | 25 | 25 |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SSE 10 | SE 9 | SSE 9 | SSE 9 | SSE 9 | NNW 12 | SSW 18 | SSW 18 | SSW 18 | S 18 | SSW 17 | SSW 17 | NNW 10 | NNW 10 | NW 10 | NW 10 | SSW 12 | SSE 13 | SSE 13 | NW 10 | SE 12 | SE 12 |
| kJ | 207 | 174 | 35 | 23 | 17 | 17 | 17 | 28 | 64 | 63 | 62 | 56 | 100 | 93 | 33 | 38 | 24 | 24 | 28 | 33 | 33 | 25 | 39 | 38 |
Wind waves Height (m) Direction Period (s) | E 8 | NE 6 | NE 6 | NE 6 | ENE 6 | NE 6 | NE 7 | ENE 8 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 | NE 8 | NE 8 |
| kJ | 157 | 46 | 59 | 56 | 52 | 56 | 79 | 120 | 121 | 161 | 170 | 202 | 202 | 209 | 238 | 236 | 267 | 307 | 307 | 339 | 348 | 322 | 299 | 270 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 6 | 6 | 14 | 6 | 14 | 14 | 14 | 14 | 14 | 16 | 16 | 16 | 16 | 166 | 168 | 168 | 170 | 168 | 171 | 180 | 171 | 16 | 16 | 16 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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