Surf Forecasts:
Kua Bay surf forecast from 18 Sep 2026:
- Best quality surf: Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 6s period, NE swell with glassy winds.
- Most powerful swell: Monday 21 Sep, 5PM (local time) - 3.5ft (1.1m), 6s period, NE swell with 80 kJ wave energy.
- Next surfable swell (1★+): Sunday 20 Sep, 11PM (local time) - 3ft (0.9m), 6s period with NE swell.
Best Forecast Surf Conditions for Kua Bay this week:
The surf forecast for Kua Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Sep 20) at 11PM. The primary swell is predicted to be 0.9m and 6s period with a secondary swell of 0.3m and 15s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kua Bay in the next 16 days are 1.1m 6s and forecast to arrive on Monday (Sep 21) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 7s period and expected on Thursday (Sep 17) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 20th Sep) | 3ft (0.9m) 6s |
| Best Surf | 11PM (Sun 20th Sep) | 3ft (0.9m) 6s |
| Most Powerful | 5PM (Mon 21st Sep) | 3.5ft (1.1m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
Short Range ForecastLight rain (total 8mm), mostly falling on Thu afternoon. Warm (max 30°C on Thu afternoon, min 26°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Tue afternoon. Warm (max 29°C on Mon morning, min 26°C on Sun night). Wind will be generally light. | |||||||||||||||||||
Thu 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | Wednesday 23 | ||||||||||||||
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) | NE 7 | SW 17 | SW 18 | WSW 9 | SW 16 | SW 16 | SW 16 | SW 16 | NE 6 | NE 6 | NNE 6 | NE 6 | NE 6 | NE 6 | NNE 6 | N 12 | NE 6 | NNW 11 | NNW 10 | SW 16 |
Wave Graph  | ||||||||||||||||||||
 kJ | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 46 | 0 | 0 | 0 | 80 | 0 | 0 | 26 | 33 | 23 | 20 | 0 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-on | cross-on | glassy | cross-on | cross | glassy | cross-on | cross-on | glassy | cross | on | cross-on | glassy | cross-on | glassy | glassy | on | glassy | glassy |
High Tide | 9:47AM0.61m | 11:11AM0.62m | 11:51PM0.27m | 12:12PM0.65m | 00:49AM0.32m | 12:56PM0.68m | 1:27AM0.37m | 1:31PM0.70m | 1:59AM0.44m | 2:03PM0.71m | 2:31AM0.52m | |||||||||
Low Tide | 00:53AM0.18m | 2:02AM0.21m | 7:43PM0.22m | 4:05AM0.22m | 7:52PM0.19m | 5:34AM0.20m | 8:07PM0.16m | 6:35AM0.18m | 8:24PM0.14m | 7:25AM0.15m | 8:41PM0.11m | |||||||||
 |  |  | | | | |  | | |  |  | | | |  |  | | | | |
 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | 6:23 | — | — | 6:23 | — | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — |
mm | 2 | 4 | — | 1 | 1 | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | 3 | 1 |
Temp °C | 30 | 29 | 28 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 29 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 34 | 32 | 31 | 32 | 30 | 31 | 30 | 31 | 31 | 32 | 29 | 32 | 32 | 31 | 31 | 31 | 31 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | NE 7 | NE 8 | NE 5 | NE 7 | NE 6 | NE 6 | NE 7 | NNE 6 | NE 7 | NE 6 | NNE 6 | NE 6 | SSW 13 | NE 6 | NNE 6 | NE 6 | ENE 9 | NE 6 | NE 6 | NNE 5 |
| kJ | 140 | 69 | 23 | 77 | 31 | 56 | 75 | 44 | 12 | 75 | 44 | 49 | 34 | 34 | 41 | 78 | 16 | 31 | 33 | 25 |
Swell 2 Height (m) Direction Period (s) | SW 16 | N 6 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 13 | SW 14 | ENE 8 | ENE 9 | ENE 9 | NNW 11 | NE 9 | ENE 9 | SW 16 |
| kJ | 64 | 21 | 78 | 145 | 127 | 64 | 64 | 62 | 42 | 41 | 38 | 35 | 8 | 14 | 47 | 33 | 25 | 19 | 15 | 63 |
Swell 3 Height (m) Direction Period (s) | SSW 18 | SW 17 | NNE 7 | WSW 9 | NNE 6 | ENE 8 | SSW 16 | ENE 8 | SW 15 | SSW 15 | ENE 8 | SSW 14 | W 11 | SSW 13 | SSW 12 | N 12 | W 12 | NNW 11 | NNW 10 | ENE 8 |
| kJ | 33 | 148 | 16 | 8 | 8 | 7 | 24 | 13 | 33 | 21 | 13 | 19 | 10 | 16 | 14 | 26 | 11 | 23 | 20 | 14 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NE 6 | — | — | — | NE 6 | — | — | — | NE 6 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | 46 | — | — | — | 80 | — | — | — | 33 | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 4 | 28 | 30 | 14 | 30 | 100 | 4 | 96 | 100 | 4 | 20 | 100 | 20 | 4 | 100 | 4 | 14 | 100 | 4 | 14 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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 Kua 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 Kua Bay Surf forecast
The above surf forecast table for Kua Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kua Bay can be found by selecting the local surf guide option on the grey menu. Our Kua 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 (Kua 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 Kua 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.
Kua Bay is 97 km (60 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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