Surf Forecasts:
Kua Bay surf forecast from 29 Jul 2026:
- Most powerful swell: Friday 31 Jul, 11PM (local time) - 3.5ft (1.0m), 6s period, NE swell with 71 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 1.0m 6s and forecast to arrive on Friday (Jul 31) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 8s period and expected on Saturday (Aug 01) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Fri 31st Jul) | 3.5ft (1.0m) 6s |
Table - best surf conditions forecast for Kua Bay over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s talk about what’s happening at Kua Bay. Straight up, for the next week and a half, the bay is flat. We’re looking at a big gap with no real swell to speak of from Wednesday the 29th of July all the way through to the 8th of August. The energy meter is stuck on zero or just a whisper for days – weak stuff – so don't bother paddling out unless you want a floating meditation session with no waves.
The only real window of opportunity pops up later in the forecast, and it’s the one to circle on your calendar. Monday morning, August 10th is the standout. We’ve got a moderate 3ft groundswell settling in from the west, carrying a solid 13-second period. The real treat here is the glassy conditions – light breeze from the southwest, making for clean faces. The combined energy reads 202, which is moderate, but the combination of that period and the clean wind will make it surfable. Kua Bay is a beach break, exposed to the west-northwest, so that west swell lines up nicely.
However, don’t get too hyped. The water temp is running at 81°, which is about a degree and a half warmer than normal for this time of year.
Monday afternoon on that same day, the wind swings onshore and the quality drops off, so make your move in the morning. Late on Sunday the 9th, the afternoon goes glassy with a similar 2ft swell, but the energy is a touch lower at 174. It’s an honorable mention, but Monday morning is the only real highlight of this 16-day stretch.
Rusty out.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 28°C on Wed morning, min 25°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 2mm), mostly falling on Mon night. Warm (max 28°C on Sun morning, min 24°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | |||||||||||||||
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) | NNE 9 | NNE 8 | SW 19 | NE 7 | SW 18 | SW 16 | SW 16 | N 9 | NNE 5 | NE 8 | NE 7 | N 11 | N 10 | N 9 | N 8 | W 11 | N 6 | W 12 | NNE 6 | W 12 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 0 | 0 | 15 | 0 | 49 | 41 | 0 | 13 | 19 | 0 | 0 | 9 | 16 | 15 | 6 | 10 | 6 | 25 | 20 | 24 | 22 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | cross | cross | off | cross-on | glassy | cross | cross-on | cross-off | glassy | on | cross | cross-on | cross | cross | cross | cross-on | glassy | cross-off |
High Tide | 4:17PM0.82m | 4:18AM0.40m | 4:45PM0.81m | 4:57AM0.44m | 5:12PM0.77m | 5:39AM0.48m | 5:39PM0.72m | 6:24AM0.51m | 6:05PM0.65m | 7:15AM0.55m | 6:33PM0.57m | 8:16AM0.59m | 7:03PM0.49m | ||||||||
Low Tide | 9:09AM0.06m | 11:12PM0.13m | 9:46AM0.07m | 11:35PM0.12m | 10:24AM0.11m | 11:59PM0.11m | 11:05AM0.16m | 00:23AM0.10m | 11:52AM0.22m | 00:48AM0.09m | 12:48PM0.28m | 1:18AM0.09m | 2:06PM0.34m | 1:54AM0.09m | |||||||
 | |  | |  |  | | | | | | | | | | | |  | | |  | |
 | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 6:00 | — | — | 6:00 | — | — | 6:00 | — | — |
 | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:59 | — |
mm | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — |
Temp °C | 28 | 28 | 26 | 28 | 28 | 27 | 28 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 26 | 27 | 26 | 26 | 27 | 27 | 27 |
Feels °C | 31 | 31 | 29 | 31 | 29 | 30 | 31 | 30 | 29 | 29 | 29 | 31 | 29 | 30 | 30 | 29 | 28 | 30 | 30 | 29 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 9 | NNE 8 | NE 7 | NE 7 | NE 7 | NE 6 | NE 6 | NE 6 | NE 6 | NE 8 | NE 7 | NE 8 | NNE 6 | NE 8 | NNE 6 | NNE 8 | NE 7 | NNE 6 | ENE 11 | ENE 11 | NE 10 |
| kJ | 116 | 71 | 75 | 43 | 77 | 49 | 54 | 62 | 17 | 119 | 140 | 116 | 34 | 113 | 44 | 72 | 21 | 18 | 47 | 47 | 61 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | ENE 8 | SSW 13 | SSW 18 | SW 18 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | NE 9 | N 9 | NE 8 | W 11 | ENE 8 | NE 9 | W 12 | N 6 | W 11 |
| kJ | 36 | 14 | 31 | 31 | 49 | 41 | 65 | 60 | 55 | 49 | 46 | 48 | 59 | 15 | 32 | 10 | 24 | 19 | 11 | 16 | 22 |
Swell 3 Height (m) Direction Period (s) | ENE 9 | SSW 13 | SW 19 | SSW 12 | SSW 12 | N 10 | ENE 8 | N 9 | ENE 8 | E 14 | E 14 | N 11 | N 10 | SSW 13 | N 8 | SW 13 | N 6 | W 12 | SW 11 | W 12 | SSW 11 |
| kJ | 8 | 34 | 15 | 14 | 29 | 7 | 6 | 13 | 13 | 4 | 4 | 9 | 16 | 16 | 6 | 7 | 6 | 25 | 5 | 24 | 12 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — | — | — | — | NNE 6 | — | — |
| kJ | — | — | — | — | — | — | — | — | 19 | — | — | — | — | — | — | — | — | — | 20 | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 98 | 98 | 39 | 97 | 39 | 4 | 100 | 4 | 4 | 101 | 4 | 4 | 100 | 39 | 98 | 101 | 100 | 93 | 51 | 20 | 39 |
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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