
Surf Forecasts:
Kua Bay surf forecast from 5 Aug 2026:
- Most powerful swell: Saturday 8 Aug, 11PM (local time) - 3ft (0.9m), 6s period, NE swell with 56 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 0.9m 6s and forecast to arrive on Saturday (Aug 08) at 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 7s period and expected on Sunday (Aug 09) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Sat 8th Aug) | 3ft (0.9m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let me be straight with you – looking at the next couple of weeks, it's gonna be a waiting game. The ocean is going to be pretty quiet for a while, and we're not looking at any kind of proper swell on the horizon. But that doesn't mean we're completely shut down. There’s always a chance things will perk up, and as the days go by, there are a few little pulses of energy that might just put a smile on your face.
We start off with a real flat spell. From Wednesday the 5th right through the middle of next week, it's basically unsurfable. We're talking tiny dribbles of waves, with the swell hanging around a meager `0.7ft` to `1ft`. The wind is mostly light and cross-shore, which keeps the surface clean-ish, but there just isn't enough power in the water to do anything. The combined swell energy is weak, sitting below `35` for most of this period. It's the kind of time you'd spend fixing your fins or checking your wax, not paddling out.
The first real glimmer of hope shows up on Saturday the 15th. The swell starts to build a touch, reaching `2ft` to `2ft` from the west. The period stretches out to a very long 15 seconds, which is a proper groundswell. That long period means the energy is there, but it also means it might be a bit too lined-up for the beach breaks, making it a better bet for the points and reefs. The energy levels jump into the moderate range, with readings around `161`. The wind is light, and while it's cross-shore, it's not too messy. It's still small, but it's the most interesting we've seen.
This pattern holds through Sunday the 16th and into Monday the 17th. The swell stays around `2ft` with that long-period west energy. The winds remain light, and there’s a window on Monday afternoon with a clean, cross-off breeze that could make things feel a bit more organized. Look, we're not talking barrels, but for a summer session on a longboard, it could be worth a look. The energy is still moderate, around `140-142`. It's the high point of the whole forecast, but it's still a far cry from epic.
After that, it fades again. The swell drops back to `2ft` and the energy weakens through the following week. There’s another brief pulse on Wednesday the 19th with energy around `142` and a glassy afternoon, but the swell remains small and the period shortens. It’s just a sign that the ocean is still breathing, but it’s not going to offer up anything memorable.
So, in a nutshell, keep your expectations low. The standout days are the 15th, 16th, and 17th, and even then, it's for the small-wave crew. The water temp is running about average for this time of year, so nothing crazy there. It's a quiet stretch, but as we all know, that can change. Keep an eye on the horizon.
Rusty
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 28°C on Wed morning, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 3mm), mostly falling on Sun afternoon. Warm (max 28°C on Sat afternoon, min 25°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | ||||||||||||||
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 13 | W 13 | W 12 | NE 8 | W 12 | W 12 | NNE 5 | W 12 | W 12 | NE 11 | SSW 18 | NE 6 | NE 6 | W 13 | W 12 | W 12 | W 11 | W 11 | W 10 |
Wave Graph | |||||||||||||||||||
12 | 28 | 11 | 0 | 11 | 12 | 14 | 11 | 11 | 0 | 0 | 42 | 0 | 29 | 25 | 24 | 21 | 21 | 19 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-on | cross-off | on | cross | cross | glassy | cross-on | cross | glassy | cross-on | glassy | glassy | cross-on | glassy | glassy | cross-on | cross | glassy |
High Tide | 9:30AM0.63m | 7:38PM0.40m | 10:50AM0.68m | 8:46PM0.32m | 12:04PM0.74m | 11:08PM0.28m | 1:05PM0.81m | 00:47AM0.29m | 1:56PM0.86m | 1:52AM0.32m | 2:42PM0.90m | 2:44AM0.37m | |||||||
Low Tide | 1:54AM0.09m | 4:10PM0.36m | 2:41AM0.10m | 6:56PM0.32m | 3:45AM0.09m | 8:07PM0.25m | 5:01AM0.08m | 8:44PM0.19m | 6:14AM0.06m | 9:17PM0.14m | 7:17AM0.03m | 9:48PM0.11m | |||||||
— | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
6:59 | — | 6:58 | — | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | |
mm | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 2 | — | — | 1 | 2 |
Temp °C | 27 | 28 | 27 | 26 | 27 | 27 | 26 | 28 | 27 | 26 | 27 | 28 | 27 | 28 | 27 | 27 | 28 | 27 | 27 |
Feels °C | 30 | 31 | 29 | 28 | 30 | 29 | 30 | 30 | 29 | 29 | 29 | 31 | 31 | 31 | 29 | 31 | 31 | 29 | 32 |
Swell 1 Height (m) Direction Period (s) | NNE 5 | NE 9 | NNE 5 | NNE 5 | NE 5 | NNE 5 | SSW 14 | NNE 4 | NE 5 | NNE 5 | NE 6 | NE 10 | NE 6 | NE 7 | NE 6 | NE 6 | NE 7 | NE 6 | NE 5 |
11 | 22 | 21 | 5 | 21 | 17 | 20 | 7 | 35 | 17 | 24 | 14 | 52 | 73 | 83 | 31 | 36 | 54 | 11 | |
Swell 2 Height (m) Direction Period (s) | ENE 10 | W 13 | NE 9 | NE 8 | NE 8 | NE 8 | ENE 7 | NE 9 | W 12 | NE 11 | NE 10 | SSW 18 | SSW 18 | W 13 | W 12 | W 12 | NE 4 | SSW 15 | NNE 7 |
39 | 28 | 20 | 18 | 10 | 9 | 5 | 14 | 11 | 30 | 15 | 31 | 30 | 29 | 25 | 24 | 10 | 47 | 18 | |
Swell 3 Height (m) Direction Period (s) | W 13 | NNE 9 | W 12 | ENE 4 | W 12 | W 12 | W 12 | W 12 | SSW 13 | SSW 13 | SSW 18 | SSW 13 | NE 9 | SSW 16 | SSW 12 | NE 8 | W 11 | W 11 | W 10 |
12 | 8 | 11 | 2 | 11 | 12 | 11 | 11 | 18 | 17 | 32 | 17 | 13 | 26 | 15 | 11 | 21 | 21 | 19 | |
Wind waves Height (m) Direction Period (s) | — | NE 4 | — | — | — | — | NNE 5 | — | — | — | — | NE 6 | — | — | — | — | — | — | — |
— | 4 | — | — | — | — | 14 | — | — | — | — | 42 | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 19 | 100 | 100 | 20 | 100 | 100 | 14 | 100 | 100 | 14 | 101 | 100 | 4 | 100 | 14 | 14 | 100 | 19 | 14 |
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.











