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Surf Forecasts:
Kahalu'u surfForecast / HAW – Big Island / USA
16 Day Weather and Surf, issued 1 pm Saturday 30 May 2026 HSTForecast update in hr min s Forecast update imminent
Kahalu'u surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kahalu'u sea temperature is
26.0° C
(Which is slightly warmer than usual)Kahalu'u surf forecast from 31 May 2026:
- Best quality surf: Sunday 31 May, 8PM (local time) - 3ft (0.9m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Tuesday 2 Jun, 2PM (local time) - 5ft (1.6m), 19s period, SSW swell with 1,670 kJ wave energy.
- Next surfable swell (1★+): Sunday 31 May, 2AM (local time) - 3ft (0.9m), 16s period with SSW swell.
Best Forecast Surf Conditions for Kahalu'u this week:
The surf forecast for Kahalu'u over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (May 31) at 2AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 0.3m and 11s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kahalu'u in the next 16 days are 1.6m 19s and forecast to arrive on Tuesday (Jun 02) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 8s period and expected on Thursday (Jun 04) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 31st May) | 3ft (0.9m) 16s |
| Best Surf | 8PM (Sun 31st May) | 3ft (0.9m) 14s |
| Most Powerful | 2PM (Tue 2nd Jun) | 5ft (1.6m) 19s |
Table - best surf conditions forecast for Kahalu'u over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Warm (max 26°C on Sat afternoon, min 24°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 7mm), mostly falling on Wed afternoon. Warm (max 26°C on Tue afternoon, min 24°C on Tue night). Wind will be generally light. | ||||||||||||||||||||
Sat 30 | Sunday 31 | Monday 1 | Tuesday 2 | Wednesday 3 | Thursday 4 | Friday 5 | |||||||||||||||
PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
S 16 | SSW 16 | SSW 15 | SSW 14 | S 19 | S 18 | S 18 | S 20 | S 19 | S 18 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 13 | |
529 | 406 | 360 | 280 | 365 | 639 | 625 | 775 | 767 | 661 | 1431 | 1064 | 1051 | 711 | 573 | 366 | 269 | 201 | 141 | 137 | 86 | |
Wind (km/h) | |||||||||||||||||||||
on | glassy | on | on | cross-off | cross-on | cross | cross-on | cross-on | cross-on | on | on | on | cross-off | cross | cross-on | glassy | cross-on | cross-on | cross-off | cross | |
High Tide | 3:45PM0.82m | 3:23AM0.33m | 4:20PM0.82m | 3:58AM0.31m | 4:56PM0.81m | 4:34AM0.30m | 5:33PM0.79m | 5:15AM0.29m | 6:11PM0.77m | 6:04AM0.29m | 6:48PM0.74m | 7:08AM0.30m | 7:27PM0.71m | 8:30AM0.33m | |||||||
Low Tide | 10:57PM0.18m | 8:51AM0.06m | 11:36PM0.18m | 9:24AM0.06m | 00:17AM0.18m | 9:57AM0.07m | 00:59AM0.18m | 10:31AM0.10m | 1:43AM0.18m | 11:07AM0.13m | 2:26AM0.18m | 11:48AM0.18m | 3:06AM0.17m | 12:44PM0.25m | |||||||
 |  | |  |  | | | | | | | |  |  | | | | | | | | |
 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 | — | — | 5:43 |
 | 6:58 | — | — | 6:58 | — | — | 6:58 | — | — | 6:59 | — | — | 6:59 | — | — | 6:59 | — | — | 7:00 | — | 7:00 |
— | — | — | — | — | — | — | — | — | — | — | — | 3 | 4 | — | — | — | — | 1 | 2 | — | |
Temp °C | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 |
27 | 28 | 27 | 27 | 27 | 29 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | |
Swell 1 Height (m) Direction Period (s) | S 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | S 18 | S 18 | S 20 | SSW 16 | SSW 15 | SSW 17 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | S 13 |
 kJ | 529 | 406 | 360 | 280 | 276 | 639 | 625 | 775 | 644 | 589 | 1431 | 1064 | 1051 | 711 | 573 | 366 | 269 | 201 | 141 | 137 | 86 |
Swell 2 Height (m) Direction Period (s) | S 12 | S 11 | S 11 | SSW 20 | S 19 | SSW 14 | SSW 13 | SSW 14 | S 19 | S 18 | — | NNW 10 | — | NNW 9 | SE 9 | NW 3 | NW 12 | W 12 | NW 11 | NW 11 | S 26 |
| kJ | 42 | 21 | 20 | 131 | 365 | 189 | 135 | 195 | 767 | 661 | — | 10 | — | 16 | 12 | 3 | 6 | 3 | 5 | 5 | 52 |
Swell 3 Height (m) Direction Period (s) | SW 11 | WSW 11 | S 21 | SSW 11 | NNW 9 | — | S 21 | SSW 16 | — | — | — | — | — | — | S 14 | SE 14 | SE 13 | NW 11 | W 11 | W 16 | NW 10 |
| kJ | 5 | 12 | 36 | 22 | 8 | — | 233 | 266 | — | — | — | — | — | — | 4 | 8 | 7 | 5 | 3 | 5 | 4 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | NNW 10 | SE 8 | NW 9 | — | — | — | — | NNW 11 | NNW 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | 38 | 34 | 21 | — | — | — | — | 12 | 10 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 0 | 79 | 77 | 0 | 123 | 13 | 6 | 123 | 49 | 94 | 49 | 14 | 0 | 31 | 25 | 0 | 125 | 25 | 0 | 98 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kahalu'u surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Kahalu'u Surf forecast
The above surf forecast table for Kahalu'u provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kahalu'u can be found by selecting the local surf guide option on the grey menu. Our Kahalu'u surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Kahalu'u) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Kahalu'u may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Kahalu'u is 93 km (58 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.
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