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Surf Forecasts:
Big Lefts surfForecast / HAW – Oahu / USA
48hr Weather and Surf, issued 1 am Wednesday 20 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
25.7° C
(Which is slightly warmer than usual)How big are the waves at Big Lefts today?
The current surf forecast for Big Lefts at 6AM is: 1.8m 8s primary swell from a East-northeast direction and 0.6m 14s secondary swell from a South-southwest direction (forecast issued at 01:00am May 20). An open ocean swell of 0.4m 12s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 6ft (1.8m) | 8s |
| Afternoon (20 May) | 7ft (2.1m) | 8s |
| Evening (20 May) | 8ft (2.5m) | 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 24°C on Wed morning, min 23°C on Wed night). Mainly strong winds. | ||||||||||||||||||||||||
Wednesday 20 | Thursday 21 | Friday 22 | ||||||||||||||||||||||
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 | ENE 8 | ENE 8 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | |
384 | 361 | 404 | 484 | 547 | 644 | 737 | 939 | 1009 | 939 | 1026 | 1081 | 1125 | 1125 | 1276 | 1225 | 1150 | 976 | 977 | 909 | 844 | 763 | 836 | 829 | |
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 | 7:16AM0.09m | 7:47PM0.64m | 8:55AM0.12m | 8:43PM0.58m | 10:30AM0.18m | 9:37PM0.51m | ||||||||||||||||||
Low Tide | 2:50AM-0.02m | 11:49AM-0.02m | 3:46AM-0.03m | 12:55PM0.05m | 4:33AM-0.04m | 2:25PM0.11m | ||||||||||||||||||
 |  |  |  | | | | | | | | | | | | | | | | | | | | | |
 | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — | — | 5:50 | — | — | — | — | — | — |
 | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:04 | — | — | — | — | — | — | — | 7:05 | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 23 | 23 |
21 | 22 | 21 | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 18 | 18 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 18 | 19 | |
Swell 1 Height (m) Direction Period (s) | 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 | S 14 | SSW 14 | SSW 14 | S 14 | S 17 |
 kJ | 172 | 167 | 163 | 163 | 115 | 108 | 105 | 69 | 68 | 134 | 132 | 132 | 85 | 127 | 113 | 157 | 110 | 110 | 72 | 107 | 67 | 62 | 93 | 140 |
Swell 2 Height (m) Direction Period (s) | 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 | S 18 | S 18 | S 18 | S 18 | SSW 13 |
| kJ | 30 | 35 | 27 | 26 | 23 | 23 | 22 | 99 | 91 | 34 | 33 | 33 | 30 | 17 | 17 | 33 | 32 | 30 | 29 | 57 | 98 | 98 | 97 | 60 |
Swell 3 Height (m) Direction Period (s) | 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 | SSW 12 | SSW 12 | SSW 12 | S 19 | SSE 12 | SSE 12 | SSE 12 | SSE 12 | SSE 12 |
| kJ | 9 | 41 | 41 | 63 | 63 | 62 | 61 | 22 | 22 | 10 | 36 | 34 | 17 | 14 | 14 | 14 | 14 | 14 | 63 | 29 | 14 | 14 | 14 | 14 |
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 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 384 | 361 | 404 | 484 | 547 | 644 | 737 | 939 | 1009 | 939 | 1026 | 1081 | 1125 | 1125 | 1276 | 1225 | 1150 | 976 | 977 | 909 | 844 | 763 | 836 | 829 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 32 | 29 | 36 | 39 | 43 | 44 | 45 | 128 | 128 | 129 | 129 | 132 | 128 | 131 | 260 | 130 | 43 | 42 | 42 | 159 | 131 | 201 | 158 | 45 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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