Surf Forecasts:
Kua Bay surf forecast from 19 Aug 2026:
- Best quality surf: Saturday 22 Aug, 11PM (local time) - 3ft (0.9m), 6s period, NE swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 2AM (local time) - 2ft (0.6m), 11s period, WNW swell with 91 kJ wave energy.
- Next surfable swell (1★+): Saturday 22 Aug, 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 Saturday (Aug 22) at 11PM. The primary swell is predicted to be 0.4m and 11s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.9m and 6s is also forecast. 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 0.6m 11s and forecast to arrive on Sunday (Aug 23) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Monday (Aug 24) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sat 22nd Aug) | 3ft (0.9m) 6s |
| Best Surf | 11PM (Sat 22nd Aug) | 3ft (0.9m) 6s |
| Most Powerful | 2AM (Sun 23rd Aug) | 2ft (0.6m) 11s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what Kua Bay is serving up for the next couple of weeks.
Overall, it's a pretty quiet stretch. The energy is just not there for most of the period, with a lot of days showing weak surf and only tiny, poor-quality waves. The water temp is sitting at 81.5°F, which is normal for this time of year. Don't get your hopes up too high, because the first real standout doesn't roll in until the end of the second week.
We start off with a long gap of nothing really worth paddling out for. From Tuesday the 18th right through to Saturday the 22nd, it's all very small, messy, and poor. We're talking ankle-snappers under 1.6ft with weak energy. The wind is mostly cross or cross-on, keeping things bumpy. Not worth wetting a suit.
Sunday the 23rd afternoon is the first sign of life, but it's still pretty ordinary. A small pulse of 3ft swell from the NNE shows up, but it's a short-period 6-second windswell, so it's crumbly and weak. The energy is moderate, but the wind goes glassy, which is a plus. Conditions are "surfable but very ordinary". It's a beach break, so the short period won't be a disaster, but it won't be great either.
Then we hit another dead zone. From Monday the 24th through to Friday the 28th, it's flat or near-flat with tiny waves and pretty much zero energy. You're better off doing something else.
The real highlight of the entire forecast shows up on Sunday the 30th of August. The afternoon session finally looks interesting. We get a 1.3ft groundswell from the WNW, with a solid 15-second period. That's a very long-period swell, which means it'll pack a punch for its size. The combined energy is moderate. The wind goes cross-off, giving us clean conditions. A 1.3ft, 15-second swell at Kua Bay, with clean offshore winds, is a sneaky good combination. The long period means the wave faces will be more defined and powerful. This is the standout session of the whole outlook.
The last few days into early September stay small and poor, with more cross-on or onshore wind and weak energy, so don't expect a repeat of the Sunday action.
Best on offer: The standout is clearly Sunday afternoon, the 30th of August. The combination of a clean 1.3ft, 15-second WNW groundswell at Kua Bay with those cross-off winds is the best bet. It won't be big, but it'll be clean and fun. It's a long period, so it'll be worth the wait.
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 28°C on Wed morning, min 26°C on Tue afternoon). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Warm (max 28°C on Fri afternoon, min 26°C on Fri night). Wind will be generally light. | |||||||||||||||||||
Tue 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | ||||||||||||||
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) | WNW 11 | WNW 13 | WNW 12 | WNW 12 | SW 16 | SW 18 | SW 17 | W 11 | WNW 10 | WNW 10 | W 11 | W 10 | WNW 10 | WNW 11 | WNW 11 | NNE 6 | NE 6 | WNW 11 | WNW 12 | WNW 11 |
Wave Graph | ||||||||||||||||||||
25 | 33 | 48 | 28 | 41 | 49 | 47 | 21 | 35 | 35 | 57 | 52 | 34 | 91 | 68 | 63 | 47 | 12 | 14 | 13 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross-off | on | cross | cross-on | cross | glassy | glassy | cross-on | glassy | glassy | cross-on | cross-off | glassy |
High Tide | 6:42PM0.41m | 9:26AM0.61m | 10:49AM0.62m | 12:03PM0.64m | 11:29PM0.26m | 12:58PM0.68m | 00:53AM0.29m | 1:40PM0.72m | 1:39AM0.32m | 2:15PM0.76m | 2:16AM0.36m | |||||||||
Low Tide | 2:41PM0.35m | 1:28AM0.14m | 2:09AM0.16m | 3:15AM0.18m | 8:38PM0.25m | 8:45PM0.21m | 5:58AM0.15m | 9:01PM0.18m | 6:54AM0.12m | 9:20PM0.16m | ||||||||||
— | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
6:50 | — | — | 6:49 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | |
mm | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 26 | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 28 | 27 |
Feels °C | 30 | 30 | 31 | 32 | 31 | 32 | 32 | 32 | 31 | 31 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | NE 5 | NNE 5 | NE 5 | NE 5 | NNE 6 | NNE 6 | NNE 7 | NNE 7 | NNE 7 | NE 7 | N 7 | NE 6 | NE 6 | WNW 11 | WNW 11 | WNW 10 | SW 14 | NE 6 | NE 6 | NE 7 |
27 | 16 | 11 | 12 | 22 | 16 | 32 | 31 | 30 | 44 | 23 | 54 | 78 | 91 | 68 | 41 | 32 | 52 | 88 | 75 | |
Swell 2 Height (m) Direction Period (s) | WNW 11 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | W 11 | SW 17 | SW 16 | WNW 10 | WNW 10 | W 11 | W 10 | WNW 10 | SW 15 | SW 15 | SSW 14 | WNW 9 | WNW 11 | SSW 13 | SSW 13 |
25 | 33 | 48 | 28 | 25 | 21 | 47 | 69 | 35 | 35 | 57 | 52 | 34 | 36 | 34 | 21 | 8 | 12 | 35 | 16 | |
Swell 3 Height (m) Direction Period (s) | W 13 | ENE 7 | NNE 7 | NNE 6 | SW 16 | SW 18 | W 11 | W 11 | SW 16 | SW 16 | NE 5 | SW 15 | SW 16 | WSW 9 | WSW 9 | SSW 16 | ENE 8 | SSW 14 | WNW 12 | WNW 11 |
14 | 5 | 5 | 8 | 41 | 49 | 21 | 21 | 69 | 65 | 8 | 37 | 63 | 9 | 8 | 24 | 6 | 18 | 14 | 13 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | NE 6 | NE 6 | NNE 6 | NE 6 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | 47 | 51 | 63 | 47 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 100 | 4 | 98 | 98 | 4 | 32 | 14 | 14 | 30 | 30 | 20 | 30 | 4 | 0 | 22 | 0 | 0 | 100 | 26 | 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.











