Surf Forecasts:
Kua Bay surf forecast from 21 Aug 2026:
- Best quality surf: Sunday 23 Aug, 8AM (local time) - 1.5ft (0.5m), 12s period, WNW swell with glassy winds.
- Most powerful swell: Sunday 23 Aug, 8AM (local time) - 1.5ft (0.5m), 12s period, WNW swell with 79 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 8AM (local time) - 1.5ft (0.5m), 12s period with WNW 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 (Aug 23) at 8AM. The primary swell is predicted to be 0.5m and 12s 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 0.5m 12s and forecast to arrive on Sunday (Aug 23) at 8AM. 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 6s period and expected on Saturday (Aug 22) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
| Best Surf | 8AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
| Most Powerful | 8AM (Sun 23rd Aug) | 1.5ft (0.5m) 12s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
G’day, Rusty here. Looks like the surf gods are taking a holiday for the next couple of weeks. We’ve got a long, dry stretch ahead with nothing really worth paddling out for, so let’s be straight up about it.
The first possible surf shows up on Friday 21 August, but it’s a bit of a tease. Kua Bay has a tiny 2ft west swell pushing through with a period of 10 seconds, and the combined energy is weak (52). The wind is a light cross-onshore, so it’s messy and small. The water temp is 82°, which is a touch warmer than normal for this time of year, so at least it’ll be a nice dip, but you’re not gonna be riding much. Friday afternoon stays small at 2ft, same west swell, but the wind goes cross-shore and it’s a bit choppy. Still a dud.
Saturday 22 August morning is even smaller at 1.0ft with a long 15-second period out of the southwest, but it’s cross-shore wind and the energy is only 70. The afternoon cleans up with glassy conditions and 2ft west swell, but the energy is still weak (57). It’s pretty, but pretty flat.
Sunday 23 August morning bumps up to 111 combined energy – that’s moderate – with a 2ft west-northwest swell and a 12-second period, but the wind is cross-onshore and it’s poor. The afternoon goes glassy again with a tiny 1ft, weak energy (45). Not worth the drive.
Then from Monday 24 August through to Saturday 5 September, we’re looking at a whole lot of nothing. There are days with zero swell, days with tiny 0.7ft or 1.0ft slop, and most of the time the wind is either cross-onshore or just messy. The 31st of August has a 1.0ft southwest swell with a 15-second period, but it’s cross-onshore and choppy. The 2nd of September has a 1.0ft west swell with a 13-second period, but again, cross-shore chop. The 4th of September has a 1.0ft west-northwest swell with a 14-second period, and the afternoon goes clean with a cross-offshore breeze, but the energy is only 35 and the swell is tiny. The 5th of September has a 2ft west swell with 12-second period and 75 energy, but it’s cross-shore or cross-onshore.
Honestly, there’s no standout. Nothing even comes close to being good. The whole 16-day window is a write-off for surf. The break is inconsistent, and this kind of blank run isn’t unusual for the area. The forecasts can change, but right now, you’re better off checking the kite forecast if you’re desperate to get on the water, because the wind is often stronger than the swell.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun afternoon. Warm (max 28°C on Fri morning, min 26°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 18mm), heaviest on Mon night. Warm (max 28°C on Mon morning, min 25°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
AM | 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) | W 10 | W 11 | W 10 | SW 15 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 10 | WNW 11 | WNW 12 | WNW 11 | NE 6 | NE 6 | NNE 5 | NE 5 | NE 5 | SSW 16 | N 5 | NE 6 | SSW 15 |
Wave Graph | |||||||||||||||||||||
52 | 59 | 50 | 37 | 57 | 58 | 77 | 45 | 18 | 13 | 13 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | glassy | cross | glassy | cross-off | cross-on | glassy | glassy | cross-on | cross | cross | cross | glassy | cross | on | cross-off | glassy | on | glassy | glassy |
High Tide | 12:03PM0.64m | 11:29PM0.26m | 12:58PM0.68m | 00:53AM0.29m | 1:40PM0.72m | 1:39AM0.32m | 2:15PM0.76m | 2:16AM0.36m | 2:46PM0.78m | 2:51AM0.41m | 3:15PM0.79m | 3:25AM0.47m | 3:42PM0.78m | 4:00AM0.52m | |||||||
Low Tide | 8:38PM0.25m | 8:45PM0.21m | 5:58AM0.15m | 9:01PM0.18m | 6:54AM0.12m | 9:20PM0.16m | 7:39AM0.10m | 9:39PM0.14m | 8:20AM0.08m | 9:58PM0.11m | 9:00AM0.08m | 10:18PM0.10m | |||||||||
6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | |
— | 6:47 | — | — | 6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | |
mm | — | — | — | — | — | — | — | 2 | 2 | — | 2 | 6 | 3 | 4 | 2 | — | 1 | — | — | — | 2 |
Temp °C | 28 | 28 | 27 | 28 | 27 | 27 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 28 | 27 | 28 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 31 | 31 | 32 | 31 | 30 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 32 | 30 | 30 | 30 | 29 | 29 | 30 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 6 | NE 5 | NE 6 | NE 6 | NE 6 | NE 6 | NNE 5 | NE 5 | NE 5 | NNE 5 | NE 5 | NE 6 | NNE 5 |
31 | 54 | 44 | 45 | 78 | 46 | 42 | 62 | 33 | 30 | 42 | 39 | 36 | 44 | 22 | 29 | 30 | 17 | 12 | 36 | 12 | |
Swell 2 Height (m) Direction Period (s) | W 10 | W 11 | W 10 | WNW 10 | W 11 | WNW 10 | WNW 12 | WNW 11 | WNW 10 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | SSW 12 | SSW 14 | SSW 15 | SSW 17 | SSW 13 | SSW 16 | SSW 15 | SSW 15 |
52 | 59 | 50 | 33 | 57 | 58 | 77 | 45 | 18 | 18 | 35 | 32 | 30 | 14 | 21 | 21 | 27 | 17 | 47 | 44 | 42 | |
Swell 3 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | SW 15 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | WNW 11 | WNW 12 | WNW 11 | SSW 16 | SSW 16 | SSW 12 | SSW 11 | SSW 14 | SSW 16 | N 5 | SSW 12 | ENE 7 |
69 | 65 | 64 | 37 | 63 | 58 | 34 | 21 | 20 | 13 | 13 | 12 | 25 | 24 | 14 | 12 | 18 | 26 | 2 | 14 | 5 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 32 | 30 | 14 | 32 | 4 | 4 | 30 | 4 | 4 | 97 | 39 | 97 | 100 | 103 | 14 | 14 | 100 | 92 | 100 | 26 | 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.











