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Number Fours surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Tuesday 19 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
25.7° C
(Which is slightly warmer than usual)How big are the waves at Number Fours today?
The current surf forecast for Number Fours at 8PM is: 1.6m 8s primary swell from a East-northeast direction and 0.8m 15s secondary swell from a South-southwest direction, 0.3m 9s secondary swell from a South-southeast direction (forecast issued at 01:00pm May 19). The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (19 May) | 5ft (1.5m) | 8s |
| Afternoon (19 May) | 5ft (1.5m) | 8s |
| Evening (19 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 ForecastMostly dry. Warm (max 25°C on Tue afternoon, min 23°C on Tue night). Mainly strong 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 |    |    |    |    | ||||||||||||||||||||
ENE 8 | ENE 8 | SSW 15 | 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 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
253 | 240 | 253 | 280 | 318 | 394 | 449 | 533 | 644 | 695 | 727 | 871 | 1009 | 1081 | 1033 | 1009 | 1202 | 1231 | 1152 | 1252 | 1173 | 1123 | 1047 | 1047 | |
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 | 6:52PM0.69m | 7:16AM0.09m | 7:47PM0.64m | 8:55AM0.12m | 8:43PM0.58m | |||||||||||||||||||
Low Tide | 10:55AM-0.08m | 2:50AM-0.02m | 11:49AM-0.02m | 3:46AM-0.03m | 12:55PM0.05m | 4:33AM-0.04m | ||||||||||||||||||
 |  | |  |  | | | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | 7:05 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 25 | 25 | 24 | 24 | 24 | 24 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
23 | 23 | 21 | 21 | 21 | 21 | 20 | 19 | 20 | 19 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 16 | S 16 | S 16 | SSW 16 | S 16 | S 15 | S 15 | S 15 | S 15 | SSW 15 |
 kJ | 178 | 178 | 246 | 249 | 167 | 172 | 167 | 163 | 163 | 115 | 108 | 105 | 69 | 68 | 134 | 132 | 132 | 85 | 127 | 113 | 157 | 110 | 110 | 72 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SSE 10 | SSE 9 | NW 11 | NW 11 | NW 12 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | SSW 17 | SSW 16 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSE 13 | SSE 13 | SSE 13 | SSE 13 | SSE 12 | SSE 12 |
| kJ | 207 | 176 | 18 | 17 | 30 | 30 | 35 | 27 | 26 | 23 | 23 | 22 | 99 | 91 | 58 | 33 | 33 | 30 | 17 | 17 | 33 | 32 | 30 | 29 |
Swell 3 Height (m) Direction Period (s) | SSE 10 | NNW 12 | NNW 12 | NNW 11 | SSE 9 | SSE 10 | SW 16 | SW 16 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | NNW 11 | NNW 10 | NNW 10 | SSE 14 | SSE 13 | SSE 13 | SSW 12 | SSW 12 | S 12 | S 12 | SSW 12 | S 19 |
| kJ | 18 | 14 | 27 | 11 | 17 | 9 | 41 | 41 | 63 | 63 | 61 | 61 | 22 | 22 | 10 | 18 | 35 | 17 | 14 | 14 | 11 | 11 | 14 | 63 |
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 | 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 | ENE 8 |
| kJ | 253 | 240 | 253 | 280 | 318 | 394 | 449 | 533 | 644 | 695 | 727 | 871 | 1009 | 1081 | 1033 | 1009 | 1202 | 1231 | 1152 | 1252 | 1173 | 1123 | 1047 | 1047 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 31 | 32 | 39 | 39 | 39 | 31 | 31 | 39 | 39 | 46 | 46 | 48 | 48 | 126 | 127 | 127 | 128 | 127 | 210 | 219 | 130 | 44 | 46 | 44 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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