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Avalanche surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am 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 7AM is: 0.9m 7s primary swell from a Northeast direction (forecast issued at 01:00am May 18). An open ocean swell of 0.8m 14s is not directed at the surf break. The wind direction is predicted to be 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) | 2.5ft (0.8m) | 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. | ||||||||||||||||||||||||
Monday 18 | Tuesday 19 | Wednesday 20 | ||||||||||||||||||||||
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 | 5 PM | 8 PM | 11 PM | |
Swell Height Map |    |    |    | |||||||||||||||||||||
NNE 6 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | NE 8 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | NNW 10 | |
26 | 73 | 77 | 75 | 71 | 71 | 67 | 49 | 47 | 30 | 30 | 30 | 90 | 75 | 76 | 76 | 97 | 92 | 67 | 69 | 95 | 99 | 64 | 63 | |
Wind (km/h) | ||||||||||||||||||||||||
off | off | 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 | 3:47AM0.11m | 4:52PM0.60m | 4:46AM0.09m | 5:44PM0.57m | 6:00AM0.09m | 6:40PM0.53m | ||||||||||||||||||
Low Tide | 8:03AM-0.09m | 11:31PM0.00m | 8:49AM-0.05m | 00:33AM0.00m | 9:42AM-0.02m | |||||||||||||||||||
 | |  |  |  | |  |  | | | | | | | | | | | | | | | | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:05 | — | — | — | — | — | — | — | 7:06 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 25 | 26 | 25 | 24 | 23 | 23 | 24 | 24 | 25 | 26 | 25 | 24 | 24 | 23 | 24 | 24 | 24 | 25 | 24 | 23 | 23 |
24 | 24 | 24 | 25 | 26 | 24 | 24 | 23 | 23 | 25 | 25 | 25 | 25 | 24 | 24 | 23 | 22 | 23 | 23 | 23 | 23 | 22 | 21 | 21 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | NE 7 | NE 7 | NE 7 | SSW 14 | SSW 14 | NE 7 | NE 6 | NE 6 | NE 6 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | NNW 10 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNW 10 |
 kJ | 239 | 73 | 77 | 75 | 229 | 168 | 67 | 49 | 47 | 30 | 173 | 175 | 178 | 239 | 249 | 242 | 252 | 92 | 183 | 163 | 158 | 149 | 145 | 63 |
Swell 2 Height (m) Direction Period (s) | NNE 6 | SSW 14 | SSW 14 | SSW 14 | SSW 19 | SSW 19 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NE 6 | NE 6 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | NNW 10 | SSW 15 | NNW 10 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | SSW 13 |
| kJ | 26 | 233 | 233 | 233 | 251 | 212 | 163 | 161 | 161 | 163 | 30 | 30 | 90 | 75 | 76 | 76 | 97 | 169 | 67 | 69 | 95 | 99 | 64 | 101 |
Swell 3 Height (m) Direction Period (s) | E 8 | SSE 7 | SSE 7 | SSW 19 | SSE 7 | SSE 7 | SE 7 | NW 12 | SSW 17 | SSW 17 | SSW 18 | SSW 18 | SSW 18 | SE 7 | SSE 9 | SSE 9 | SE 9 | SSE 9 | NNW 12 | SSE 9 | SSW 18 | SSW 18 | S 18 | SSW 17 |
| kJ | 33 | 16 | 19 | 251 | 18 | 15 | 12 | 35 | 92 | 97 | 273 | 207 | 176 | 12 | 35 | 35 | 23 | 17 | 48 | 16 | 63 | 62 | 56 | 100 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | NE 7 | NE 7 | E 8 | — | — | — | — | — | NE 6 | NE 6 | ENE 6 | ENE 6 | NE 6 | NE 8 | ENE 8 | ENE 5 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | — | — | — | — | 71 | 71 | 223 | — | — | — | — | — | 42 | 51 | 49 | 49 | 56 | 91 | 106 | 70 | 186 | 179 | 171 | 171 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 5 | 0 | 0 | 14 | 14 | 14 | 14 | 8 | 8 | 8 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 14 | 14 | 14 | 14 | 16 | 16 | 16 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
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