- Forecast
- Maps
- Live
- Weather State
- Spot Information
Surf Forecasts:
Number Fours surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Saturday 16 May 2026 HSTForecast update in hr min s Forecast update imminent
Number Fours surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Number Fours sea temperature is
25.4° C
(Which is normal for this time of year)How big are the waves at Number Fours today?
The current surf forecast for Number Fours at 6AM is: 1.6m 8s primary swell from a East-northeast direction and 0.5m 14s secondary swell from a Southwest direction (forecast issued at 01:00am May 16). The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 May) | 5ft (1.6m) | 8s |
| Afternoon (16 May) | 5ft (1.6m) | 8s |
| Evening (16 May) | 5ft (1.6m) | 8s |
Table - waves today at Number Fours. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 2mm), mostly falling on Sat afternoon. Warm (max 25°C on Sat morning, min 24°C on Sat morning). Winds increasing (light winds from the NE on Sat night, fresh winds from the ENE by Mon afternoon). | ||||||||||||||||||||||||
Saturday 16 | Sunday 17 | Monday 18 | ||||||||||||||||||||||
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 |    |    |    | |||||||||||||||||||||
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 | SSW 15 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
287 | 324 | 373 | 341 | 322 | 322 | 322 | 280 | 280 | 330 | 291 | 291 | 250 | 250 | 216 | 299 | 370 | 404 | 404 | 350 | 404 | 394 | 366 | 306 | |
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 | 3:06AM0.19m | 4:19PM0.72m | 3:56AM0.15m | 5:08PM0.74m | 4:50AM0.11m | 5:59PM0.73m | ||||||||||||||||||
Low Tide | 8:47AM-0.15m | 11:40PM0.00m | 9:26AM-0.14m | 00:43AM-0.00m | 10:08AM-0.12m | |||||||||||||||||||
 |  |  | | |  |  | | | |  | | | | | | | | | | | | | | |
 | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — | — | 5:52 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:01 | — | — | — | — | — | — | — | 7:02 | — | — | — | — | — | — | — | 7:02 | — | — |
— | — | — | — | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
25 | 26 | 25 | 26 | 25 | 26 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 24 | 25 | 23 | 22 | 21 | 21 | 22 | 22 | |
Swell 1 Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | SSW 15 | SSW 14 | ENE 8 | ENE 8 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | ENE 8 |
 kJ | 287 | 324 | 373 | 341 | 322 | 322 | 322 | 280 | 280 | 244 | 30 | 291 | 250 | 250 | 216 | 188 | 186 | 404 | 404 | 180 | 180 | 168 | 163 | 306 |
Swell 2 Height (m) Direction Period (s) | SSE 11 | SW 14 | SSW 16 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 17 | SSE 11 | SSE 11 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSE 7 | SSE 7 | SSW 14 | SSW 14 | SSW 19 | SSW 19 | SSW 19 | SSE 10 | SSW 14 |
| kJ | 39 | 49 | 164 | 104 | 103 | 102 | 102 | 109 | 105 | 133 | 138 | 131 | 179 | 193 | 191 | 16 | 15 | 180 | 180 | 251 | 251 | 148 | 19 | 161 |
Swell 3 Height (m) Direction Period (s) | SW 13 | SSE 11 | SSE 11 | SSE 10 | SSW 16 | SSW 16 | SSW 17 | SSE 12 | SW 15 | SW 14 | SSE 11 | SSE 7 | SSE 7 | SSE 7 | SSW 21 | SSE 10 | SSE 10 | SSE 7 | SSE 7 | SSE 10 | SSE 10 | SSE 10 | SSW 16 | SSE 6 |
| kJ | 45 | 38 | 22 | 21 | 53 | 89 | 92 | 46 | 54 | 102 | 47 | 29 | 30 | 18 | 180 | 21 | 20 | 9 | 9 | 39 | 39 | 33 | 51 | 8 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | ENE 8 | ENE 8 | — | — | — | — | ENE 8 | ENE 8 | — | — | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | — | — | — | — | — | — | — | — | — | 330 | 291 | — | — | — | — | 299 | 370 | — | — | 350 | 404 | 394 | 366 | 204 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 4 | 31 | 1 | 0 | 0 | 0 | 1 | 1 | 31 | 33 | 1 | 31 | 31 | 31 | 1 | 1 | 31 | 32 | 39 | 31 | 31 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Number Fours surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Nearest