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Mahai'ula Bay Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Mahai'ula Bay surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 1 pm Monday 18 May 2026 HSTForecast update in hr min s Forecast update imminent
Mahai'ula Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mahai'ula Bay sea temperature is
26.2° C
(Which is 1.0°C warmer than normal for this time of year)Updates in hr min s Forecast update imminent
Short Range ForecastModerate rain (total 16mm), heaviest on Mon afternoon. Warm (max 27°C on Mon afternoon, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
SSW 19 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 15 | SSW 14 | SSW 14 | N 5 | SSW 14 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | NNE 6 | S 16 | N 6 | S 16 | S 16 | |
0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 31 | 0 | 0 | |
Wind (km/h) | ||||||||||||||||||||||||
cross-on | cross | cross-off | cross | on | glassy | glassy | glassy | cross-on | cross-on | glassy | glassy | cross-off | glassy | glassy | glassy | glassy | on | glassy | cross-off | cross-off | cross | cross-off | cross-off | |
High Tide | 5:37PM0.93m | 5:26AM0.30m | 6:28PM0.88m | 6:32AM0.28m | 7:22PM0.82m | 7:56AM0.29m | ||||||||||||||||||
Low Tide | 10:03AM-0.01m | 1:02AM0.14m | 10:48AM0.03m | 2:03AM0.14m | 11:37AM0.09m | 3:05AM0.14m | ||||||||||||||||||
 |  | |  | | | |  | | | | | | |  | | | | | |  | | | | |
 | — | — | — | — | — | — | 5:47 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — |
 | — | — | 6:52 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | 6:54 |
— | 2 | 3 | 1 | 1 | 3 | 1 | — | — | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | |
Temp °C | 27 | 27 | 26 | 26 | 25 | 24 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
30 | 29 | 29 | 30 | 29 | 28 | 28 | 29 | 28 | 29 | 30 | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 27 | 26 | 26 | 26 | |
Swell 1 Height (m) Direction Period (s) | NNE 6 | NNE 6 | NNE 7 | NNE 6 | NNE 6 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | NNE 6 | SSW 15 | SSW 14 | NNE 6 | NNE 6 | SSW 14 | NNE 6 | NNE 7 | SSW 14 | SSW 14 | NNE 6 | NNE 6 | NNE 6 | S 16 | S 16 |
 kJ | 34 | 51 | 68 | 41 | 41 | 229 | 236 | 163 | 180 | 33 | 242 | 239 | 47 | 34 | 213 | 40 | 68 | 107 | 104 | 149 | 91 | 70 | 134 | 132 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SSW 16 | SSW 14 | SSW 14 | SSW 14 | NNE 6 | NNE 6 | NNE 6 | NNE 6 | SSW 14 | NNE 6 | NE 6 | SSW 14 | SSW 14 | NNE 5 | SSW 14 | SSW 14 | SSW 18 | SSW 18 | SSW 13 | S 16 | SSW 16 | SSE 5 | SSE 13 |
| kJ | 174 | 191 | 166 | 163 | 163 | 31 | 27 | 22 | 23 | 160 | 33 | 39 | 233 | 210 | 23 | 158 | 156 | 103 | 103 | 102 | 135 | 203 | 7 | 57 |
Swell 3 Height (m) Direction Period (s) | SSW 19 | SW 19 | SSW 16 | SSW 16 | SSE 10 | SSE 10 | SW 18 | SSW 17 | SSW 17 | SSW 17 | SSE 9 | SSE 10 | SSE 9 | SSE 9 | SSE 9 | SSW 18 | SSW 18 | SSE 9 | SSE 9 | SSW 17 | SSW 13 | S 4 | SSW 13 | SSW 13 |
| kJ | 251 | 96 | 87 | 87 | 18 | 18 | 80 | 101 | 99 | 101 | 16 | 18 | 17 | 17 | 16 | 102 | 62 | 16 | 16 | 97 | 67 | 10 | 57 | 55 |
Wind waves Height (m) Direction Period (s) | — | — | — | S 10 | — | — | — | — | — | — | — | — | — | N 5 | — | SSE 7 | SSW 6 | NNE 6 | NNE 6 | S 9 | S 4 | N 6 | NNE 6 | NNE 6 |
| kJ | — | — | — | 17 | — | — | — | — | — | — | — | — | — | 14 | — | 9 | 4 | 49 | 96 | 55 | 8 | 31 | 70 | 132 |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 100 | 34 | 1 | 38 | 100 | 11 | 11 | 11 | 100 | 103 | 100 | 11 | 100 | 100 | 19 | 11 | 1 | 113 | 11 | 1 | 1 | 19 | 18 | 1 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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