Surf Forecasts:
Coast Guard surf forecast from 18 Aug 2026:
- Best quality surf: Thursday 20 Aug, 11PM (local time) - 3ft (0.9m), 7s period, NE swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 5PM (local time) - 8ft (2.5m), 7s period, ENE swell with 740 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 11PM (local time) - 3ft (0.9m), 7s period with NE swell.
Best Forecast Surf Conditions for Coast Guard this week:
The surf forecast for Coast Guard over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 11PM. The primary swell is predicted to be 0.9m and 7s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Coast Guard in the next 16 days are 2.5m 7s and forecast to arrive on Monday (Aug 24) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.0m 6s period and expected on Sunday (Aug 23) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Best Surf | 11PM (Thu 20th Aug) | 3ft (0.9m) 7s |
| Most Powerful | 5PM (Mon 24th Aug) | 8ft (2.5m) 7s |
Table - best surf conditions forecast for Coast Guard over the next 16 days.
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue morning). Mainly fresh winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Fri morning, min 25°C on Fri night). Winds increasing (light winds from the ESE on Fri morning, strong winds from the ENE by Sun night). | ||||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | |||||||||||||||
AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | NE 7 | NE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | WNW 10 | WNW 10 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 196 | 245 | 212 | 183 | 220 | 161 | 71 | 73 | 75 | 48 | 179 | 189 | 310 | 468 | 19 | 20 | 333 | 0 | 383 | 740 | 509 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross | 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 | 5:07PM0.51m | 9:12AM0.63m | 10:57AM0.66m | 12:05PM0.70m | 12:49PM0.75m | 11:54PM0.34m | 1:23PM0.79m | 00:44AM0.37m | 1:51PM0.83m | 1:21AM0.42m | |||||||||||
Low Tide | 1:29PM0.47m | 00:40AM0.18m | 1:22AM0.20m | 2:39AM0.22m | 4:19AM0.21m | 8:46PM0.30m | 5:31AM0.17m | 8:43PM0.28m | 6:21AM0.14m | 8:51PM0.26m | |||||||||||
 | |  | | | |  | |  | | | | | | | | | | | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — |
 | — | 6:50 | — | — | 6:49 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 |
Feels °C | 25 | 25 | 24 | 27 | 26 | 24 | 28 | 28 | 28 | 30 | 25 | 26 | 24 | 23 | 24 | 24 | 23 | 21 | 21 | 21 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SW 18 | WNW 13 | SW 16 | SW 16 | SW 16 | ENE 7 | E 7 | SW 16 | ENE 6 | SW 16 | SSW 16 | SW 15 | SW 16 | SW 15 | SSW 15 | SW 14 | SW 14 | SSW 14 | SSW 13 | SSW 13 |
| kJ | 45 | 79 | 33 | 67 | 64 | 67 | 71 | 38 | 133 | 48 | 122 | 169 | 116 | 122 | 113 | 86 | 54 | 52 | 36 | 69 | 90 |
Swell 2 Height (m) Direction Period (s) | WNW 11 | SSW 13 | SW 18 | WNW 12 | WNW 12 | W 11 | NNE 6 | SW 17 | E 7 | NNE 7 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | WNW 10 | SSW 16 | SSW 15 | SW 14 | S 18 | SSW 16 |
| kJ | 25 | 34 | 49 | 28 | 28 | 22 | 23 | 148 | 25 | 29 | 33 | 35 | 36 | 34 | 19 | 20 | 48 | 42 | 32 | 25 | 26 |
Swell 3 Height (m) Direction Period (s) | SSW 13 | W 11 | SSW 13 | S 12 | SW 19 | S 12 | SW 18 | W 11 | W 11 | SW 17 | SSW 18 | SW 9 | SSW 17 | WSW 10 | WNW 12 | SSW 16 | WNW 9 | SW 9 | SW 18 | SW 18 | SW 16 |
| kJ | 34 | 10 | 17 | 11 | 55 | 11 | 152 | 21 | 20 | 142 | 33 | 3 | 28 | 10 | 14 | 25 | 8 | 3 | 12 | 12 | 11 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | — | NE 7 | NE 7 | — | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 |
| kJ | 196 | 245 | 212 | 183 | 220 | 161 | — | 73 | 75 | — | 179 | 189 | 310 | 468 | 180 | 267 | 333 | 207 | 383 | 740 | 509 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 68 | 70 | 54 | 68 | 23 | 34 | 23 | 23 | 0 | 0 | 23 | 23 | 23 | 23 | 23 | 23 | 79 | 65 | 73 | 75 | 54 |
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 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 16 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.
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