Surf Forecasts:
Kua Bay surf forecast from 11 Aug 2026:
- Best quality surf: Monday 17 Aug, 2AM (local time) - 1.5ft (0.4m), 12s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 11AM (local time) - 7.5ft (2.3m), 6s period, SW swell with 363 kJ wave energy.
- Next surfable swell (1★+): Monday 17 Aug, 2AM (local time) - 1.5ft (0.4m), 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 Monday (Aug 17) at 2AM. The primary swell is predicted to be 0.4m and 12s period with a secondary swell of 0.6m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Kua Bay in the next 16 days are 2.3m 6s and forecast to arrive on Sunday (Aug 16) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 13s period and expected on Saturday (Aug 15) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 17th Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 2AM (Mon 17th Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 11AM (Sun 16th Aug) | 7.5ft (2.3m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright, let’s talk Kua Bay in feet and miles per hour, since that’s how the tape reads for some.
Straight up, this forecast is a long, flat drag. Water’s about 81°F, which is normal for this time of year—no anomaly worth mentioning. But the waves? Barely a ripple.
Monday afternoon kicks things off with a tiny 1ft west swell, cross wind, and it’s just poor. Tuesday through Thursday stays in the 1ft range, mostly cross or cross-onshore breezes. Wednesday afternoon goes glassy, but with a weak 2-3ft NNE swell and a period of only 5 seconds, there’s no power—combined energy is a measly 67. Not worth suiting up.
Friday stays tiny—2-3ft from the NNE, offshore wind in the morning, but again, low energy and short period.
Then Saturday the 15th finally brings some size—6ft from the NE with 237 energy—moderate push. But a strong 25 mph cross-shore wind makes it a mess. This is kite-surfing weather, not clean surfing. Sunday the 16th is the big moment: 7-8ft from the SW, 414 energy, and clean cross-off wind. That’s the standout, but it’s a short-period wind swell, only 6 seconds, so it’s lumpy and expert-only. For the brave, this is your shot.
After Sunday, it’s a desert. From Monday the 17th through the end, you’re looking at 1ft or less, with occasional glassy conditions but zero swell. The combined energy barely hits 90 even on the best days.
Overall, Kua Bay is flat or poor for nearly the whole 16 days. The one flicker of life is Sunday morning, August 16th—7-8ft SW wind swell, clean but raw. Everything else? Leave the stick at home.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon afternoon. Warm (max 29°C on Wed afternoon, min 25°C on Tue night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 8mm), mostly falling on Sat night. Warm (max 28°C on Thu afternoon, min 25°C on Thu night). Winds increasing (calm on Thu night, strong winds from the NNE by Sat afternoon). | |||||||||||||||||||
Mon 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | ||||||||||||||
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 11 | W 10 | SSW 14 | W 10 | W 11 | W 11 | NNE 5 | SSW 16 | NE 6 | W 12 | NE 5 | NNE 6 | W 12 | NNE 5 | NE 6 | WNW 11 | WNW 13 | SW 6 | W 7 | WNW 12 |
Wave Graph  | ||||||||||||||||||||
 kJ | 21 | 18 | 0 | 19 | 23 | 22 | 34 | 0 | 44 | 25 | 41 | 40 | 30 | 75 | 228 | 24 | 58 | 363 | 97 | 45 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | glassy | cross-on | cross | glassy | cross-on | glassy | glassy | on | cross-on | cross-on | on | cross-on | cross | cross | cross | cross-off | cross-off | cross-off | cross-off |
High Tide | 2:42PM0.90m | 2:44AM0.37m | 3:22PM0.91m | 3:31AM0.43m | 4:00PM0.88m | 4:16AM0.49m | 4:34PM0.83m | 5:00AM0.54m | 5:06PM0.76m | 5:44AM0.58m | 5:36PM0.67m | 6:30AM0.60m | 6:02PM0.58m | |||||||
Low Tide | 9:48PM0.11m | 8:12AM0.02m | 10:18PM0.09m | 9:03AM0.02m | 10:47PM0.07m | 9:51AM0.05m | 11:15PM0.07m | 10:38AM0.10m | 11:41PM0.07m | 11:27AM0.17m | 00:06AM0.08m | 12:18PM0.24m | 00:32AM0.09m | |||||||
 |  |  |  |  | | |  | | | | | | | |  |  | | | | |
 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 6:54 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — |
mm | 4 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 6 | — | — | — |
Temp °C | 27 | 27 | 28 | 27 | 27 | 28 | 29 | 27 | 28 | 28 | 27 | 28 | 28 | 26 | 28 | 26 | 26 | 28 | 28 | 27 |
Feels °C | 31 | 31 | 31 | 30 | 31 | 29 | 31 | 31 | 30 | 30 | 29 | 30 | 29 | 27 | 27 | 23 | 24 | 26 | 27 | 28 |
Swell 1 Height (m) Direction Period (s) | NE 6 | NE 7 | NNE 5 | NE 6 | NE 5 | SSW 13 | SSW 13 | NE 5 | SSW 16 | NNE 6 | SSW 14 | NE 8 | NE 7 | SSW 14 | SSW 13 | WNW 11 | NE 13 | NNE 10 | W 7 | NE 8 |
| kJ | 40 | 37 | 17 | 40 | 27 | 32 | 32 | 30 | 48 | 39 | 70 | 15 | 44 | 36 | 35 | 24 | 2023 | 358 | 97 | 57 |
Swell 2 Height (m) Direction Period (s) | SSW 15 | W 10 | NE 7 | SSW 14 | SSW 13 | W 11 | WNW 13 | SSW 16 | WNW 12 | SSW 15 | W 12 | SSW 14 | SSW 14 | W 12 | W 11 | SSW 13 | WNW 13 | WNW 12 | NE 9 | W 7 |
| kJ | 47 | 18 | 16 | 40 | 35 | 22 | 33 | 51 | 28 | 44 | 11 | 41 | 40 | 11 | 9 | 35 | 58 | 51 | 115 | 34 |
Swell 3 Height (m) Direction Period (s) | W 11 | SSW 15 | SSW 14 | W 10 | W 11 | S 18 | S 17 | SSW 13 | SSW 12 | W 12 | S 18 | W 11 | W 12 | E 10 | ENE 17 | SW 16 | S 13 | ENE 12 | WNW 12 | WNW 12 |
| kJ | 21 | 23 | 41 | 19 | 23 | 56 | 53 | 32 | 14 | 25 | 6 | 10 | 24 | 8 | 28 | 10 | 14 | 14 | 49 | 45 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | NNE 7 | NNE 5 | — | NE 6 | — | NE 5 | NNE 6 | NE 5 | NNE 5 | NE 6 | NE 6 | — | SW 6 | SSW 6 | SW 6 |
| kJ | — | — | — | — | — | 30 | 34 | — | 44 | — | 41 | 40 | 30 | 75 | 228 | 392 | — | 363 | 171 | 58 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 100 | 14 | 101 | 39 | 14 | 98 | 100 | 4 | 14 | 14 | 19 | 4 | 19 | 19 | 446 | 96 | 53 | 53 | 28 | 0 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
Latest Updates
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Kua Bay surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest