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Kahalu'u Beach Park Surf Forecast
/ HAW – Big Island (60 breaks) / Hawaii (267 breaks) /
Surf Forecasts:
Kahalu'u Beach Park surfForecast / HAW – Big Island / USA
48hr Weather and Surf, issued 1 pm Thursday 21 May 2026 HSTForecast update in hr min s Forecast update imminent
Kahalu'u Beach Park surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kahalu'u Beach Park sea temperature is
26.6° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Kahalu'u Beach Park today?
The current surf forecast for Kahalu'u Beach Park at 8PM is: 0.6m 15s primary swell from a South-southwest direction and 0.3m 12s secondary swell from a South-southwest direction (forecast issued at 01:00pm May 21). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 May) | 1.5ft (0.5m) | 16s |
| Afternoon (21 May) | 1.5ft (0.5m) | 15s |
| Evening (21 May) | 2ft (0.6m) | 15s |
Table - waves today at Kahalu'u Beach Park. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastLight rain (total 5mm), mostly falling on Fri night. Warm (max 26°C on Thu afternoon, min 23°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thu 21 | Friday 22 | Saturday 23 | Sun 24 | |||||||||||||||||||||
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 |    |    |    |    | ||||||||||||||||||||
S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | S 15 | SSW 15 | SSW 14 | S 18 | S 18 | S 17 | S 17 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 | |
186 | 122 | 174 | 172 | 169 | 157 | 167 | 163 | 103 | 97 | 148 | 135 | 190 | 190 | 188 | 183 | 233 | 218 | 212 | 212 | 150 | 148 | 138 | 134 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | glassy | glassy | cross | glassy | glassy | glassy | cross-on | on | glassy | cross-off | cross-off | cross-off | glassy | glassy | on | on | glassy | cross-off | cross | on | glassy | cross-off | |
High Tide | 8:16PM0.75m | 9:37AM0.33m | 9:12PM0.68m | 11:07AM0.41m | 10:08PM0.61m | |||||||||||||||||||
Low Tide | 12:32PM0.16m | 4:01AM0.14m | 1:51PM0.25m | 4:46AM0.13m | 3:36PM0.31m | 5:24AM0.11m | ||||||||||||||||||
 |  | |  | | |  | | | | | | | |  |  | | | | | | | | | |
 | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:45 | — |
 | — | — | 6:53 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:54 | — | — | — | — | 6:54 |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | — | 1 | — | — | 1 | 1 | — | |
Temp °C | 27 | 26 | 26 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 25 |
29 | 27 | 28 | 28 | 27 | 28 | 26 | 27 | 26 | 27 | 27 | 26 | 25 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | |
Swell 1 Height (m) Direction Period (s) | S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | S 15 | SSW 15 | SSW 14 | S 14 | S 14 | S 17 | S 17 | S 16 | S 16 | S 16 | S 16 | S 15 | S 15 | S 15 | S 15 | S 14 | S 14 | S 14 | S 14 |
 kJ | 186 | 122 | 174 | 172 | 169 | 157 | 167 | 163 | 103 | 97 | 148 | 135 | 190 | 190 | 188 | 183 | 233 | 218 | 212 | 212 | 150 | 148 | 138 | 134 |
Swell 2 Height (m) Direction Period (s) | S 13 | SSW 12 | SSW 12 | SSW 12 | SSW 12 | SW 12 | S 18 | S 18 | S 18 | S 18 | S 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SE 12 | SSE 11 | NNW 11 | NNW 10 | S 3 | SSW 3 | S 4 | S 16 |
| kJ | 13 | 29 | 28 | 28 | 48 | 71 | 59 | 101 | 99 | 97 | 93 | 61 | 99 | 58 | 57 | 57 | 5 | 13 | 11 | 10 | 1 | 2 | 1 | 20 |
Swell 3 Height (m) Direction Period (s) | SW 15 | SE 13 | S 4 | NNW 9 | S 19 | SE 12 | SE 12 | SSE 12 | S 11 | S 11 | SSW 11 | NNW 10 | NNW 10 | NNW 11 | NNW 11 | SSE 12 | NW 11 | N 17 | S 18 | S 18 | S 17 | NW 15 | NNW 10 | NW 14 |
| kJ | 8 | 7 | 3 | 8 | 30 | 6 | 6 | 14 | 9 | 9 | 12 | 10 | 10 | 11 | 11 | 14 | 5 | 6 | 25 | 25 | 23 | 8 | 10 | 7 |
Wind waves Height (m) Direction Period (s) | NW 9 | WNW 9 | NW 5 | — | — | — | NW 5 | — | SW 2 | SW 3 | WSW 3 | SW 11 | NW 3 | — | SSE 5 | — | WSW 2 | NW 11 | — | SE 3 | SSE 4 | NNW 10 | NNW 5 | — |
| kJ | 13 | 27 | 6 | — | — | — | 6 | — | 2 | 2 | 2 | 30 | 4 | — | 5 | — | 1 | 18 | — | 2 | 6 | 10 | 4 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 160 | 138 | 0 | 0 | 14 | 0 | 0 | 0 | 13 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 472 | 464 | 0 | 0 | 11 | 2 | 0 | 0 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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