- Forecast
- Maps
- Live
- Weather State
- Spot Information
Coast Guard surfForecast / HAW – Big Island / USA
12 Day Weather and Surf, issued 1 am Saturday 09 Aug 2025 HST
Best Forecast Surf Conditions for Coast Guard this week:
The surf forecast for Coast Guard over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 10) at 2AM. The primary swell is predicted to be 1.3m and 11s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Coast Guard in the next 12 days are 1.7m 10s and forecast to arrive on Friday (Aug 15) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Friday (Aug 15) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Sun 10th Aug) | 4.5ft (1.3m) 11s |
| Best Surf | 2AM (Sun 10th Aug) | 4.5ft (1.3m) 11s |
| Most Powerful | 8PM (Fri 15th Aug) | 5.5ft (1.7m) 10s |
Table - best surf conditions forecast for Coast Guard over the next 12 days.
Short Range Forecast Mostly dry. Warm (max 26°C on Sat morning, min 24°C on Sat night). Wind will be generally light. | Days 3-6 Weather Summary Mostly dry. Warm (max 26°C on Tue morning, min 24°C on Tue night). Mainly fresh winds. | ||||||||||||||||||||
Saturday 09 | Sunday 10 | Monday 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | Friday 15 | |||||||||||||||
| AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Rating (10 max) | |||||||||||||||||||||
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
| Wave Height (m) & direction (?) | |||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 10 | 9 | 6 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 |
Wave (?)Graph  | |||||||||||||||||||||
| Energy (?) | 284 | 249 | 407 | 306 | 307 | 238 | 117 | 204 | 175 | 2 | 2 | 123 | 48 | 76 | 110 | 255 | 450 | 231 | 490 | 524 | 470 |
Wind (km/h) | |||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- off | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 3:45PM 0.92 | 3:34AM 0.51 | 4:12PM 0.89 | 4:20AM 0.56 | 4:38PM 0.83 | 5:10AM 0.59 | 5:03PM 0.75 | 6:06AM 0.63 | 5:26PM 0.66 | 7:15AM 0.65 | 5:43PM 0.57 | 8:44AM 0.68 | 5:28PM 0.49 | ||||||||
Low Tide / height (m) | 8:37AM 0.05 | 10:28PM 0.20 | 9:17AM 0.08 | 10:51PM 0.18 | 9:59AM 0.15 | 11:16PM 0.16 | 10:45AM 0.23 | 11:43PM 0.14 | 11:39AM 0.33 | 12:14AM 0.13 | 12:52PM 0.42 | 12:50AM 0.13 | 3:27PM 0.48 | 1:40AM 0.14 | |||||||
Saturday 09 | Sunday 10 | Monday 11 | Tuesday 12 | Wednesday 13 | Thursday 14 | Friday 15 | |||||||||||||||
| Sunrise | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:01 | - | - | 6:03 | - | - |
| Sunset | - | 6:55 | - | - | 6:54 | - | - | 6:54 | - | - | 6:53 | - | - | 6:53 | - | - | 6:52 | - | - | 6:52 | - |
 | |  |  |  |  | | | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 26 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 25 | 25 | 25 | 26 | 26 | 25 |
| Feels °C (?) | 24 | 25 | 24 | 28 | 28 | 28 | 25 | 26 | 25 | 24 | 24 | 23 | 24 | 24 | 25 | 23 | 22 | 24 | 22 | 24 | 23 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Recent Eyeball Surf Reports for HAW - Big Island
Continuing clean conditions at Coast Guard (calm at BUOY-KWHH1 24 km from Coast Guard). 1.2m 8s swell from the ENE with a 0.3m 12s groundswell from the W. 2 swells combining to make bigger set waves.
24 km away, 1 h 22 min ago
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 Coast Guard 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 Coast Guard Surf forecast
The above surf forecast table for Coast Guard provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Coast Guard can be found by selecting the local surf guide option on the grey menu. Our Coast Guard 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 (Coast Guard) 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 Coast Guard 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.
Coast Guard is 84 km (52 miles) from Kihei. If you plan a vacation in Big Island, look for hotels and other accommodation in Kihei. Kihei has rooms for a wide range of budgets as well as car hire and transport links.
Nearest