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Kahalu'u surfForecast / HAW – Big Island / USA
12 Day Weather and Surf, issued 1 pm Thursday 03 Jul 2025 HST
Best Forecast Surf Conditions for Kahalu'u this week:
The surf forecast for Kahalu'u over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Jul 03) at 11PM. The primary swell is predicted to be 0.5m and 12s period with a secondary swell of 0.4m and 16s. Another secondary swell of 0.2m and 3s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kahalu'u in the next 12 days are 0.6m 16s and forecast to arrive on Wednesday (Jul 09) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 14s period and expected on Friday (Jul 04) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 3rd Jul) | 1.5ft (0.4m) 16s |
| Best Surf | 2AM (Tue 8th Jul) | 1.5ft (0.4m) 18s |
| Most Powerful | 2AM (Wed 9th Jul) | 2ft (0.6m) 16s |
Table - best surf conditions forecast for Kahalu'u over the next 12 days.
Thu 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tue 15 | ||||||||||||||||||||||||
| PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | 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) (?) | 16 | 16 | 14 | 19 | 18 | 18 | 18 | 16 | 16 | 16 | 15 | 16 | 19 | 18 | 17 | 16 | 16 | 14 | 15 | 13 | 12 | 12 | 12 | 11 | 16 | 16 | 15 | 14 | 14 | 19 | 18 | 18 | 16 | 16 | 15 | 14 |
Wave (?)Graph  | ||||||||||||||||||||||||||||||||||||
| Energy (?) | 132 | 129 | 52 | 137 | 85 | 87 | 95 | 108 | 111 | 73 | 67 | 63 | 53 | 205 | 120 | 159 | 238 | 187 | 178 | 161 | 155 | 148 | 118 | 95 | 104 | 98 | 84 | 84 | 83 | 154 | 225 | 315 | 180 | 208 | 146 | 115 |
Wind (km/h) | ||||||||||||||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- on | cross- off | on | cross- on | glass | cross- on | glass | cross- on | on | cross | cross- on | cross- on | cross | glass | on | cross | glass | on | cross | cross- on | cross- on | cross- on | glass | cross- on | on | on | cross | on | cross- off | cross- on | cross- on | glass | cross- on | cross | cross- on | on |
High Tide / height (m) | 9:25PM 0.42 | 12:24PM 0.63 | 10:33PM 0.36 | 1:07PM 0.68 | 11:53PM 0.32 | 1:47PM 0.73 | 1:01AM 0.30 | 2:26PM 0.78 | 1:53AM 0.30 | 3:03PM 0.81 | 2:38AM 0.30 | 3:39PM 0.84 | 3:19AM 0.31 | 4:14PM 0.86 | 4:00AM 0.32 | 4:48PM 0.86 | 4:43AM 0.35 | 5:21PM 0.85 | 5:31AM 0.37 | 5:53PM 0.81 | 6:24AM 0.41 | 6:26PM 0.75 | 7:25AM 0.46 | |||||||||||||
Low Tide / height (m) | 5:51PM 0.38 | 4:31AM 0.13 | 7:39PM 0.34 | 5:12AM 0.13 | 8:39PM 0.28 | 5:55AM 0.11 | 9:19PM 0.24 | 6:40AM 0.09 | 9:52PM 0.20 | 7:24AM 0.07 | 10:24PM 0.18 | 8:05AM 0.05 | 10:55PM 0.16 | 8:45AM 0.03 | 11:26PM 0.15 | 9:24AM 0.03 | 11:57PM 0.13 | 10:04AM 0.06 | 12:27AM 0.12 | 10:47AM 0.10 | 12:57AM 0.11 | 11:34AM 0.16 | 1:27AM 0.10 | 12:31PM 0.24 | ||||||||||||
Thu 03 | Friday 04 | Saturday 05 | Sunday 06 | Monday 07 | Tuesday 08 | Wednesday 09 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tue 15 | ||||||||||||||||||||||||
| Sunrise | - | - | 5:48 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:50 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 | - | - | 5:52 |
| Sunset | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:06 | - | - | 7:05 | - | - |
 |  |  | | |  | |  | | | | | | | | | | | |  | | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 3 | - | 2 | 4 | 1 | 1 | 4 | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 |
| Feels °C (?) | 26 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 27 | 27 | 29 | 27 | 28 | 27 | 27 | 27 | 27 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 29 |
Short Range Forecast: Some drizzle, heaviest during Fri morning. Warm (max 26°C on Sat morning, min 24°C on Thu night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Sun afternoon, min 24°C on Sun night). Wind will be generally light. | Days 6-9 Weather Summary Moderate rain (total 15mm), heaviest on Wed night. Warm (max 26°C on Wed afternoon, min 24°C on Wed night). Wind will be generally light. | Long Range Forecast: Mostly dry. Warm (max 27°C on Sun morning, min 25°C on Sat night). Wind will be generally light. | |||||||||||||||||||||||||||||||||
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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 12 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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