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Surf Forecasts:
Big Lefts surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 pm Monday 18 May 2026 HSTForecast update in hr min s Forecast update imminent
Big Lefts surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Big Lefts sea temperature is
25.5° C
(Which is normal for this time of year)How big are the waves at Big Lefts today?
The current surf forecast for Big Lefts at 8PM is: 1.7m 8s primary swell from a East-northeast direction and 0.7m 14s secondary swell from a South-southwest direction, 0.3m 16s secondary swell from a South-southwest direction (forecast issued at 01:00pm May 18). The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 May) | 5.5ft (1.7m) | 8s |
| Afternoon (18 May) | 5.5ft (1.7m) | 8s |
| Evening (18 May) | 5ft (1.6m) | 8s |
Table - waves today at Big Lefts. (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 Wed night). Mainly strong 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 |    |    |    |    | ||||||||||||||||||||
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 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | |
361 | 394 | 353 | 353 | 277 | 259 | 259 | 226 | 226 | 253 | 298 | 318 | 302 | 353 | 361 | 484 | 484 | 497 | 629 | 686 | 807 | 871 | 880 | 939 | |
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 | 5:59PM0.73m | 5:55AM0.09m | 6:52PM0.69m | 7:16AM0.09m | 7:47PM0.64m | |||||||||||||||||||
Low Tide | 10:08AM-0.12m | 1:48AM-0.01m | 10:55AM-0.08m | 2:50AM-0.02m | 11:49AM-0.02m | 3:46AM-0.03m | ||||||||||||||||||
 |  | |  | |  | | | | | | | | | | | | | | | | | | | |
 | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — |
 | — | — | 7:02 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | 7:04 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 |
21 | 20 | 21 | 22 | 23 | 23 | 23 | 23 | 22 | 23 | 21 | 22 | 21 | 21 | 22 | 20 | 20 | 19 | 20 | 18 | 18 | 18 | 18 | 18 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | 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 |
 kJ | 180 | 180 | 168 | 163 | 161 | 161 | 163 | 175 | 178 | 178 | 246 | 249 | 167 | 172 | 167 | 163 | 163 | 158 | 108 | 105 | 69 | 68 | 134 | 132 |
Swell 2 Height (m) Direction Period (s) | SSW 19 | SSW 19 | SSW 19 | SSW 16 | SSE 10 | SSW 16 | SSW 17 | SSW 18 | SSW 18 | SSW 18 | SSE 6 | SSE 9 | SSE 9 | NW 11 | NW 12 | NNW 12 | NNW 12 | NNW 11 | NNW 11 | NNW 11 | SSW 17 | SSW 16 | SSW 13 | SSW 13 |
| kJ | 251 | 251 | 148 | 51 | 38 | 91 | 96 | 207 | 207 | 176 | 7 | 17 | 17 | 30 | 35 | 27 | 26 | 23 | 23 | 22 | 99 | 91 | 67 | 56 |
Swell 3 Height (m) Direction Period (s) | SSE 7 | SSE 7 | SSE 7 | SSE 6 | SSW 16 | SSE 6 | SW 18 | SSE 10 | SSE 6 | SSE 6 | NNW 12 | NNW 11 | NW 11 | SSE 10 | SW 16 | SW 16 | SSW 18 | SSW 18 | SSW 18 | SSW 18 | NNW 11 | NNW 10 | NNW 10 | SSE 14 |
| kJ | 15 | 9 | 9 | 8 | 51 | 8 | 80 | 30 | 8 | 8 | 27 | 11 | 30 | 18 | 41 | 41 | 63 | 63 | 61 | 61 | 22 | 22 | 10 | 18 |
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 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 |
| kJ | 361 | 394 | 353 | 353 | 277 | 259 | 259 | 226 | 226 | 253 | 298 | 318 | 302 | 353 | 361 | 484 | 484 | 497 | 629 | 686 | 807 | 871 | 880 | 939 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 29 | 36 | 36 | 29 | 0 | 29 | 1 | 1 | 29 | 29 | 36 | 29 | 29 | 29 | 29 | 36 | 36 | 42 | 43 | 43 | 45 | 46 | 129 | 45 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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