Surf Forecasts:
Kua Bay surf forecast from 3 Sep 2026:
- Best quality surf: Monday 7 Sep, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 8PM (local time) - 10ft (3.0m), 14s period, SW swell with 3,324 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5AM (local time) - 5.5ft (1.7m), 14s period with SW 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 Monday (Sep 07) at 5AM. The primary swell is predicted to be 1.7m and 14s period. 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 3.0m 14s and forecast to arrive on Monday (Sep 07) 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 1.6m 14s period and expected on Monday (Sep 07) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 7th Sep) | 5.5ft (1.7m) 14s |
| Best Surf | 8PM (Mon 7th Sep) | 10ft (3.0m) 14s |
| Most Powerful | 8PM (Mon 7th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's be straight with you: the next couple of weeks are looking pretty bleak. We've got a serious flat spell on our hands for Kua Bay, and I'm not going to sugarcoat it.
Looking at the whole 16-day window, there’s really only one pulse of energy that’s worth getting excited about, and it’s a long way off. We’re talking about a good stretch of nothing to start, so don't bother waxing up just yet. The ocean is going to be a lake for several days here.
The first sign of life doesn't show up until the 7th of September. Early that Monday morning, we see a bump of swell starting to fill in, but it's messy and not worth your time. The real deal is that Monday afternoon. The wind swings offshore and cleans things right up, and we get a solid push of SW groundswell. We're looking at head-high plus surf, pushing 8 feet, with a 14-second period. That's proper groundswell energy – the combined energy meter reads a solid 2686, so there's some real power behind it. This is the standout of the whole outlook. The swell direction is SSW, and this spot likes it from the WNW, but the power and clean conditions will make it work for the experienced crew. This is one for the more advanced surfers, as 8 feet is no joke.
After that pulse, things just shut right back down. The 8th has some leftover energy but the wind is howling at 19 mph, which ruins any chance of it being clean. From the 9th through the rest of the window, it's back to tiny dribbles and flatness. There are a few long-period pulses on the 10th, 13th, and 14th, but they have almost no size behind them. We're talking ankle-snappers at best. Not worth the paddle.
So here's the plan: if you're an experienced surfer, keep your eye on the afternoon of the 7th. It's a long way out, so treat it as promising but not a lock. For everyone else, you might have to find something else to do for the next couple of weeks. This blank run is pretty normal for this stretch of coast this time of year, so don't lose faith.
Signing off.
Rusty
Short Range ForecastMostly dry. Warm (max 28°C on Thu morning, min 26°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Sun night. Warm (max 29°C on Mon afternoon, min 26°C on Sat night). Winds increasing (calm on Sun morning, fresh winds from the S by Mon night). | ||||||||||||||||||
Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 8 | ||||||||||||||
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) | W 10 | NE 6 | W 9 | NNE 6 | SSW 12 | NNE 6 | S 12 | SSW 12 | SSW 12 | SSW 12 | SW 13 | SW 14 | N 10 | SW 13 | SW 14 | WSW 12 | W 11 | WNW 10 | W 7 |
Wave Graph  | |||||||||||||||||||
 kJ | 8 | 0 | 2 | 44 | 0 | 63 | 0 | 0 | 0 | 0 | 0 | 0 | 30 | 1102 | 2686 | 2059 | 815 | 248 | 38 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | glassy | glassy | cross-off | glassy | glassy | cross-on | cross-on | glassy | cross-on | cross | cross-on | cross | cross-on | cross-off | cross-off | cross-off | cross-off | glassy |
High Tide | 8:58AM0.68m | 6:59PM0.32m | 10:26AM0.70m | 9:25PM0.26m | 11:46AM0.74m | 11:54PM0.28m | 12:47PM0.78m | 1:07AM0.33m | 1:36PM0.81m | 1:57AM0.40m | 2:18PM0.82m | 2:40AM0.48m | |||||||
Low Tide | 00:59AM0.09m | 5:04PM0.31m | 1:54AM0.12m | 7:14PM0.25m | 3:19AM0.14m | 7:46PM0.20m | 4:58AM0.14m | 8:14PM0.15m | 6:18AM0.11m | 8:41PM0.12m | 7:21AM0.09m | 9:06PM0.09m | |||||||
 |  |  |  | | | | | | | |  |  | | | | | | | |
 | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | 6:37 | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:34 | — | — | 6:32 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | 3 | — | — | — | — | — | 3 |
Temp °C | 27 | 28 | 28 | 27 | 27 | 28 | 26 | 28 | 28 | 27 | 28 | 27 | 27 | 27 | 29 | 29 | 29 | 29 | 27 |
Feels °C | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 30 | 31 | 30 | 31 | 30 | 31 | 31 | 31 | 31 | 28 | 29 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | NE 6 | NE 7 | S 13 | NE 6 | SSW 12 | NNE 6 | NNE 7 | NNE 6 | SSW 12 | SW 13 | SW 14 | SW 14 | SW 13 | SW 14 | WSW 12 | W 11 | WNW 10 | W 7 |
| kJ | 42 | 39 | 85 | 31 | 34 | 50 | 29 | 56 | 52 | 230 | 431 | 586 | 947 | 1102 | 2686 | 2059 | 815 | 248 | 38 |
Swell 2 Height (m) Direction Period (s) | W 10 | NE 8 | S 14 | ENE 8 | SSW 12 | E 14 | S 12 | SSW 12 | SSW 12 | NNE 6 | NNE 6 | NNE 6 | NE 12 | ENE 12 | NE 12 | NE 11 | NE 9 | SSW 8 | SSW 9 |
| kJ | 8 | 14 | 15 | 6 | 50 | 16 | 72 | 81 | 121 | 33 | 51 | 48 | 212 | 193 | 282 | 147 | 71 | 64 | 45 |
Swell 3 Height (m) Direction Period (s) | SW 13 | S 14 | W 9 | E 14 | E 14 | N 8 | ENE 14 | ENE 14 | ENE 14 | E 13 | E 13 | ENE 6 | N 10 | N 6 | SSW 16 | SSW 16 | SSW 15 | WSW 7 | NE 8 |
| kJ | 7 | 16 | 2 | 4 | 15 | 1 | 38 | 38 | 61 | 87 | 84 | 22 | 30 | 21 | 84 | 80 | 86 | 37 | 32 |
Wind waves Height (m) Direction Period (s) | NE 8 | — | — | NNE 6 | — | NNE 6 | — | — | — | — | — | — | — | — | — | — | SW 9 | — | — |
| kJ | 82 | — | — | 44 | — | 63 | — | — | — | — | — | — | — | — | — | — | 152 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 19 | 112 | 4 | 20 | 30 | 30 | 20 | 28 | 28 | 28 | 30 | 0 | 17 | 53 | 51 | 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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