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Surf Forecasts:
Kapoho Bay surfForecast / HAW – Big Island / USA
16 Day Weather and Surf, issued 1 pm Friday 20 Mar 2026 HSTForecast update in hr min s Forecast update imminent
Kapoho Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kapoho Bay sea temperature is
24.5° C
(Which is normal for this time of year)Best Forecast Surf Conditions for Kapoho Bay this week:
The surf forecast for Kapoho Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Mar 21) at 5PM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.6m and 7s. Another secondary swell of 0.6m and 4s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kapoho Bay in the next 16 days are 1.4m 9s and forecast to arrive on Wednesday (Mar 25) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.4m 10s period and expected on Wednesday (Mar 25) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 21st Mar) | 1.5ft (0.5m) 12s |
| Best Surf | 5AM (Sun 22nd Mar) | 1.5ft (0.5m) 17s |
| Most Powerful | 11PM (Wed 25th Mar) | 4.5ft (1.4m) 9s |
Table - best surf conditions forecast for Kapoho Bay over the next 16 days.
Updates in hr min s Forecast update imminent
Short Range Forecast Moderate rain (total 19mm), heaviest on Sun afternoon. Warm (max 26°C on Sat afternoon, min 21°C on Sun night). Wind will be generally light. | Days 3-6 Weather Summary Light rain (total 5mm), mostly falling on Mon afternoon. Warm (max 23°C on Tue morning, min 21°C on Mon afternoon). Winds increasing (light winds from the E on Mon afternoon, fresh winds from the NNE by Wed afternoon). | ||||||||||||||||||||||
Fri 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | |||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | |||
Rating (10 max) | |||||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 12 | 12 | 17 | 16 | 7 | 16 | 14 | 14 | 7 | 6 | 9 | 7 | 7 | 8 | 8 | 15 | 14 | 14 | 14 | ||
Wave (?)Graph  | |||||||||||||||||||||||
 kJ (?) | 113 | 102 | 69 | 68 | 166 | 89 | 79 | 95 | 70 | 69 | 55 | 61 | 37 | 92 | 164 | 223 | 54 | 73 | 62 | 106 | 203 | ||
Wind (km/h) | |||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- off | cross | cross- off | cross | cross- off | cross | cross | glass | cross | cross | cross | cross | cross | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | ||
High Tide / height (m) | 4:38PM 0.96 | 4:20AM 0.76 | 5:21PM 0.96 | 4:49AM 0.67 | 6:11PM 0.94 | 5:17AM 0.58 | 7:14PM 0.89 | 5:45AM 0.49 | 8:40PM 0.85 | 10:21PM 0.85 | 10:21AM 0.39 | 11:40PM 0.87 | 12:07PM 0.47 | ||||||||||
Low Tide / height (m) | 10:47PM 0.23 | 10:33AM 0.03 | 11:37PM 0.30 | 11:05AM 0.05 | 12:39AM 0.38 | 11:41AM 0.09 | 2:13AM 0.43 | 12:26PM 0.15 | 1:39PM 0.22 | 6:42AM 0.35 | 3:40PM 0.26 | 7:07AM 0.29 | |||||||||||
Fri 20 | Saturday 21 | Sunday 22 | Monday 23 | Tuesday 24 | Wednesday 25 | Thursday 26 | |||||||||||||||||
| Sunrise | - | - | 6:22 | - | - | 6:20 | - | - | 6:20 | - | - | 6:20 | - | - | 6:18 | - | - | 6:18 | - | - | 6:16 | ||
| Sunset | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | 6:30 | - | - | ||
 |  |  |  |  | | |  |  | |  |  | | | | |  | | | | | |||
Rain (mm) | - | - | - | 1 | 3 | 1 | 4 | 7 | 3 | 3 | 2 | - | - | - | - | - | - | - | - | - | - | ||
| Temp. °C | 25 | 24 | 25 | 26 | 24 | 24 | 25 | 23 | 21 | 21 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 | 23 | ||
| Feels °C (?) | 24 | 24 | 24 | 26 | 26 | 27 | 25 | 22 | 23 | 23 | 21 | 20 | 20 | 21 | 20 | 19 | 19 | 21 | 21 | 20 | 24 | ||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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 Kapoho Bay 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 Kapoho Bay Surf forecast
The above surf forecast table for Kapoho Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kapoho Bay can be found by selecting the local surf guide option on the grey menu. Our Kapoho Bay 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 (Kapoho Bay) 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 Kapoho Bay 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.
Kapoho Bay is 37 km (23 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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