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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 Wednesday 20 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
26.5° 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 6PM is: 0.5m 13s primary swell from a South-southwest direction and 0.4m 17s secondary swell from a South-southwest direction, 0.3m 14s secondary swell from a South-southwest direction (forecast issued at 01:00pm May 20). The wind direction is predicted to be glassy and the swell rating is 2.
| Time (HST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 May) | 2ft (0.6m) | 14s |
| Afternoon (20 May) | 1.5ft (0.4m) | 18s |
| Evening (20 May) | 1.5ft (0.4m) | 17s |
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 6mm), mostly falling on Wed afternoon. Warm (max 27°C on Wed afternoon, min 23°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Wed 20 | Thursday 21 | Friday 22 | Sat 23 | |||||||||||||||||||||
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 14 | SSW 18 | SSW 18 | SSW 17 | S 16 | SSW 16 | S 16 | S 16 | S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | S 15 | S 15 | SSW 14 | S 18 | S 18 | S 17 | S 17 | S 16 | S 16 | S 16 | S 16 | |
156 | 107 | 102 | 102 | 134 | 147 | 132 | 132 | 186 | 122 | 174 | 172 | 169 | 157 | 155 | 183 | 103 | 97 | 148 | 135 | 190 | 190 | 188 | 183 | |
Wind (km/h) | ||||||||||||||||||||||||
on | on | cross-on | glassy | cross-off | glassy | glassy | glassy | cross-on | on | on | cross-off | cross-off | glassy | glassy | cross-off | cross-on | cross-on | glassy | cross-off | cross-off | cross-off | cross-off | cross | |
High Tide | 7:20PM0.82m | 7:53AM0.29m | 8:16PM0.75m | 9:37AM0.33m | 9:12PM0.68m | |||||||||||||||||||
Low Tide | 11:33AM0.09m | 3:06AM0.15m | 12:32PM0.16m | 4:01AM0.14m | 1:51PM0.25m | 4:46AM0.13m | ||||||||||||||||||
 | |  |  |  | | | | | | |  |  | | | | |  | | | | | | | |
 | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — | — | — | — | — | — | — | 5:46 | — |
 | — | — | 6:53 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | — | — | — | 6:53 | — | — | — | — | 6:54 |
— | — | 1 | 1 | — | 1 | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | |
Temp °C | 26 | 27 | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 25 | 25 | 24 | 24 | 25 | 26 | 25 | 25 | 24 | 24 | 24 | 23 | 24 |
29 | 30 | 29 | 29 | 28 | 28 | 28 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 26 | 27 | 28 | 27 | 28 | 26 | 25 | 25 | 25 | 26 | |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 16 | SSW 16 | S 16 | S 16 | S 16 | S 16 | SSW 15 | SSW 15 | SSW 15 | S 15 | S 15 | SSW 14 | S 14 | S 14 | S 17 | S 17 | S 16 | S 16 | S 16 | S 16 |
 kJ | 156 | 107 | 102 | 102 | 134 | 147 | 132 | 132 | 186 | 122 | 174 | 172 | 169 | 157 | 155 | 183 | 103 | 97 | 148 | 135 | 190 | 190 | 188 | 183 |
Swell 2 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SSW 18 | SSW 17 | SSW 13 | SSW 13 | SSW 13 | SSW 13 | SSE 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 | S 13 | SSW 13 | SSW 13 |
| kJ | 62 | 103 | 102 | 96 | 67 | 56 | 57 | 56 | 17 | 29 | 28 | 28 | 28 | 51 | 59 | 101 | 99 | 97 | 93 | 61 | 99 | 89 | 34 | 57 |
Swell 3 Height (m) Direction Period (s) | SSW 16 | SSW 16 | NNW 10 | NNW 10 | NW 10 | NW 9 | NW 9 | NW 9 | NW 9 | SSE 13 | SE 13 | SE 13 | S 19 | SE 12 | NW 5 | SSE 12 | S 11 | S 11 | SW 11 | SSW 11 | NNW 10 | NNW 11 | SE 12 | NNW 11 |
| kJ | 25 | 25 | 10 | 10 | 15 | 14 | 13 | 13 | 13 | 16 | 7 | 6 | 30 | 6 | 4 | 14 | 9 | 9 | 19 | 23 | 10 | 11 | 5 | 12 |
Wind waves Height (m) Direction Period (s) | — | SSW 9 | SSW 14 | SSW 14 | — | NNW 5 | NW 5 | — | — | — | NW 2 | NW 3 | NW 3 | — | SSE 12 | SSE 12 | SW 3 | W 3 | NW 3 | — | SE 12 | SE 12 | WSW 11 | — |
| kJ | — | 8 | 19 | 38 | — | 2 | 6 | — | — | — | 2 | 1 | 5 | — | 57 | 57 | 3 | 2 | 2 | — | 35 | 35 | 23 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 125 | 138 | 11 | 0 | 0 | 0 | 0 | 0 | 14 | 25 | 3775 | 0 | 0 | 0 | 0 | 0 | 6 | 2 | 0 | 0 | 0 | 0 | 0 | 1 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||||||
Header Global | ||||||||||||||||||||||||
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