Surf Forecasts:
Kua Bay surf forecast from 23 Jul 2026:
- Most powerful swell: Saturday 25 Jul, 11PM (local time) - 0.5ft (0.1m), 14s period, SW swell with 8 kJ wave energy.
Best Forecast Surf Conditions for Kua Bay this week:
The most powerful waves expected at Kua Bay in the next 16 days are 0.1m 14s and forecast to arrive on Saturday (Jul 25) at 11PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Saturday (Jul 25) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 25th Jul) | 0.5ft (0.1m) 14s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at the next couple of weeks for Kua Bay.
To be straight with you, the first week and a half is a total write-off. From Thursday the 23rd of July right through to the afternoon of Wednesday the 5th of August, there’s just nothing doing. The combined energy is sitting at zero, and the swell charts are empty. It’s a flat spell, plain and simple. The wind does go glassy a few times – like Friday morning the 24th and Saturday afternoon the 25th – but without any swell, it’s just a pretty lake. Don’t bother paddling out.
Then finally, on Thursday the 6th of August, we see a pulse of energy roll in. The morning is still poor, but by the afternoon we get a combined energy of 104 (moderate) and the call is “surfable waves but very ordinary conditions.” That’s the first sign of life. The swell is coming from the west at 2ft, with a period of 14 seconds – that’s a proper groundswell, long period, which means clean lines but longer waits between sets. The wind is cross-offshore from the south at 9 mph, which should keep the faces reasonably clean. It’s not a standout day, but it’s the only game in town.
The best of the whole run, and the only one I’d call a standout, is the morning of Friday the 7th of August. It’s a small step up in energy – combined energy reading 90 (weak) – but the swell holds from the west at 2ft, and the period is a quality 13 seconds. The wind is cross-on from the WSW at 6 mph, which is okay but not perfect. It’s still very small, and the conditions are only “poor” according to the data, so don’t expect a classic. But compared to the two weeks of nothing, this is the best you’ll get. For a beginner, 2ft is fine; for anyone else, keep your expectations low.
All in all, it’s a long, flat stretch with a tiny window of small, marginal groundswell right at the very end. The water temp isn’t flagged as anything unusual, so it’s about average for the time of year. Keep the board waxed and hope the next forecast brings more.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Wed night. Warm (max 28°C on Sat morning, min 25°C on Wed night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Sun morning, min 25°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Thursday 23 | Friday 24 | Saturday 25 | Sunday 26 | Monday 27 | Tuesday 28 | ||||||||||||||
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) | SSW 22 | SSW 20 | SSW 20 | SSW 18 | NNE 7 | NE 7 | NNE 8 | NNE 8 | NNE 8 | SW 14 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 10 | NNE 9 | NNE 9 | NNE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross | glassy | glassy | cross | glassy | on | glassy | cross | on | cross | cross | on | cross | glassy | on | cross-on | glassy |
High Tide | 9:15PM0.33m | 12:37PM0.67m | 11:22PM0.29m | 1:25PM0.71m | 00:50AM0.29m | 2:06PM0.75m | 1:45AM0.30m | 2:43PM0.78m | 2:27AM0.32m | 3:16PM0.81m | 3:05AM0.34m | 3:48PM0.82m | 3:41AM0.37m | ||||||
Low Tide | 4:20AM0.14m | 8:43PM0.28m | 5:20AM0.14m | 9:10PM0.23m | 6:17AM0.12m | 9:35PM0.20m | 7:07AM0.10m | 9:59PM0.18m | 7:51AM0.07m | 10:24PM0.16m | 8:31AM0.06m | 10:48PM0.14m | |||||||
 |  |  |  | | | | | | | | | | | | | | | | |
 | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — |
 | 7:04 | — | 7:04 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:01 | — |
mm | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 26 | 27 | 27 | 26 | 28 | 28 | 27 |
Feels °C | 30 | 29 | 29 | 30 | 29 | 29 | 28 | 29 | 31 | 30 | 28 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
Swell 1 Height (m) Direction Period (s) | NNE 5 | NE 6 | NE 6 | NE 6 | NNE 7 | NE 7 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 8 | NNE 7 | NNE 10 | ENE 12 | NNE 9 | NNE 8 |
| kJ | 17 | 37 | 52 | 29 | 64 | 88 | 98 | 123 | 126 | 112 | 103 | 95 | 95 | 101 | 86 | 105 | 52 | 116 | 78 |
Swell 2 Height (m) Direction Period (s) | SSW 22 | SSW 20 | SSW 20 | SSW 18 | SSW 18 | SW 17 | SSW 20 | SSW 16 | SSW 18 | SSW 18 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | ENE 13 | SSW 14 | ENE 12 | ENE 12 |
| kJ | 91 | 78 | 75 | 66 | 61 | 76 | 76 | 51 | 102 | 60 | 86 | 84 | 48 | 42 | 41 | 34 | 37 | 50 | 78 |
Swell 3 Height (m) Direction Period (s) | SSW 17 | SSW 16 | SSW 16 | SSW 17 | SSW 13 | SSW 21 | SSW 16 | SSW 20 | S 11 | SW 14 | E 14 | E 14 | E 14 | E 14 | E 13 | SSW 14 | — | SSW 14 | SSW 14 |
| kJ | 28 | 25 | 25 | 30 | 17 | 45 | 25 | 37 | 2 | 8 | 15 | 16 | 15 | 15 | 31 | 41 | — | 39 | 37 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 9 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 133 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 20 | 100 | 113 | 14 | 100 | 32 | 14 | 100 | 4 | 4 | 100 | 100 | 14 | 18 | 100 | 14 | 98 | 14 | 4 |
Best forecast wave conditions in Big Island | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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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