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Avalanche surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Monday 18 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
25.3° 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: 0.9m 7s primary swell from a Northeast direction (forecast issued at 01:00pm May 18). An open ocean swell of 0.7m 14s is not directed at the surf break, a second open ocean swell of 1.3m 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 (18 May) | 3ft (0.9m) | 7s |
| Afternoon (18 May) | 3ft (0.9m) | 7s |
| Evening (18 May) | 3ft (0.9m) | 7s |
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 Mon afternoon, min 23°C on Mon night). Mainly fresh winds. | ||||||||||||||||||||||||
Mon 18 | Tuesday 19 | Wednesday 20 | Thu 21 | |||||||||||||||||||||
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 7 | NE 7 | SSW 14 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NE 8 | |
62 | 69 | 0 | 67 | 54 | 47 | 38 | 46 | 38 | 90 | 75 | 76 | 76 | 95 | 92 | 67 | 69 | 95 | 75 | 75 | 63 | 41 | 39 | 169 | |
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 | 4:52PM0.60m | 4:46AM0.09m | 5:44PM0.57m | 6:00AM0.09m | 6:40PM0.53m | 7:31AM0.11m | ||||||||||||||||||
Low Tide | 8:03AM-0.09m | 11:31PM0.00m | 8:49AM-0.05m | 00:33AM0.00m | 9:42AM-0.02m | 1:31AM0.00m | ||||||||||||||||||
 |  | |  | |  |  |  | | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — | — | — | 7:06 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 26 | 25 | 24 | 24 | 23 | 24 | 24 | 25 | 26 | 25 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 23 |
25 | 26 | 24 | 24 | 24 | 23 | 25 | 25 | 25 | 26 | 24 | 24 | 23 | 23 | 24 | 23 | 24 | 23 | 22 | 21 | 20 | 20 | 20 | 20 | |
Swell 1 Height (m) Direction Period (s) | NE 7 | SSW 14 | SSW 14 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | SSW 14 | NE 6 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | NNW 10 | SSW 14 | SSW 14 | SSW 13 | S 16 | SSW 13 | SE 8 |
 kJ | 62 | 229 | 168 | 67 | 54 | 47 | 38 | 46 | 175 | 39 | 239 | 249 | 246 | 249 | 233 | 183 | 163 | 95 | 149 | 145 | 101 | 139 | 102 | 33 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 19 | SSW 19 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NE 6 | SSW 14 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | NNW 10 | NNW 10 | SSW 14 | NNW 11 | NNW 11 | NNW 10 | NNW 10 | S 16 | S 16 |
| kJ | 233 | 251 | 212 | 163 | 161 | 161 | 163 | 173 | 38 | 178 | 75 | 76 | 76 | 95 | 92 | 67 | 69 | 158 | 75 | 75 | 63 | 41 | 135 | 134 |
Swell 3 Height (m) Direction Period (s) | SSW 19 | SSE 7 | SSE 7 | SE 7 | SSE 10 | SSW 17 | SSW 17 | SSW 18 | SSW 18 | NNW 12 | SSE 7 | SSE 6 | SE 9 | SSE 9 | SSE 9 | NNW 12 | SSE 9 | SSW 18 | SE 9 | SE 9 | SSW 17 | SSW 13 | NNW 10 | SSW 13 |
| kJ | 251 | 18 | 15 | 11 | 38 | 92 | 97 | 273 | 207 | 90 | 9 | 8 | 23 | 17 | 17 | 48 | 16 | 63 | 21 | 20 | 100 | 67 | 39 | 101 |
Wind waves Height (m) Direction Period (s) | E 8 | NE 7 | ENE 7 | E 8 | — | — | — | — | — | E 8 | NE 7 | NE 6 | ENE 6 | ENE 6 | ENE 8 | ENE 8 | ENE 7 | ENE 5 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | NE 8 |
| kJ | 223 | 69 | 83 | 223 | — | — | — | — | — | 157 | 52 | 39 | 47 | 52 | 82 | 80 | 131 | 73 | 157 | 175 | 171 | 187 | 179 | 169 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 14 | 14 | 14 | 14 | 8 | 8 | 8 | 6 | 6 | 6 | 6 | 6 | 14 | 14 | 6 | 14 | 14 | 14 | 16 | 16 | 16 | 16 | 168 | 16 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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