Surf Forecasts:
Kua Bay surf forecast from 31 Aug 2026:
- Most powerful swell: Sunday 6 Sep, 8PM (local time) - 2ft (0.6m), 10s period, WSW swell with 64 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 0.6m 10s and forecast to arrive on Sunday (Sep 06) at 8PM. 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 Monday (Aug 31) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sun 6th Sep) | 2ft (0.6m) 10s |
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 the next sixteen days for Kua Bay. I gotta be straight with you – this stretch is a tough one. The forecast is quiet, real quiet. We’re looking at a long gap of small, poor surf conditions right through the start, with nothing worth paddling out for. The first few days are a write-off, and we’ve got a dry spell that stretches almost a full week before we even see a whisper of energy.
The best of what's on offer isn't much, but it's all we've got. The standout window arrives around Sunday, September 6th. We see a bump in the swell from the southwest, pushing 2ft at 9 seconds. The combined energy hits 67 (moderate), which is the most we’ll see. The morning has a light offshore wind from the NW, which could make things tidy. It’s a small day, but for an intermediate, it might be the most fun you’ll have. The water temp is about average for the time of year, nothing wild.
After that, we get a few more days of tiny, weak swells. The period drags on through the second week with very little to get excited about. On Friday, September 11th, we get a late-afternoon glass-off with a 1ft, 15-second groundswell from the SW. That long period (62 energy) will bring some real shape, but the size is tiny. It’s a mellow session for the patient surfer.
There’s a chance of a few clean windows around the 10th and 12th with cross-off winds, but the swell is barely there. This is one of those quiet runs where you just have to wait for the next system. Keep an eye on it, but don’t plan a trip around it.
Rusty.
Short Range ForecastMostly dry. Warm (max 28°C on Tue morning, min 26°C on Mon morning). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Sat afternoon. Warm (max 29°C on Thu morning, min 26°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | |||||||||||||||
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) | SW 15 | NNE 6 | NE 8 | W 12 | NE 8 | NNE 6 | W 11 | W 10 | W 10 | SW 13 | W 9 | W 9 | NE 7 | NE 7 | SSW 10 | NE 7 | NE 7 | SW 9 | SW 9 | SW 9 | WSW 9 |
Wave Graph  | |||||||||||||||||||||
 kJ | 33 | 0 | 0 | 11 | 0 | 0 | 9 | 8 | 8 | 7 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 55 | 52 | 43 | 32 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | glassy | glassy | on | cross-off | cross-on | cross | glassy | glassy | glassy | cross | cross-off | glassy | cross | cross-on | cross | cross-on | glassy | on | cross-on | cross-on |
High Tide | 5:30PM0.55m | 6:44AM0.67m | 5:58PM0.47m | 7:43AM0.68m | 6:27PM0.39m | 8:58AM0.68m | 6:59PM0.32m | 10:26AM0.70m | 9:25PM0.26m | 11:46AM0.74m | 11:54PM0.28m | 12:47PM0.78m | 1:07AM0.33m | ||||||||
Low Tide | 11:58AM0.22m | 11:50PM0.07m | 1:00PM0.27m | 00:21AM0.07m | 2:28PM0.32m | 00:59AM0.09m | 5:04PM0.31m | 1:54AM0.12m | 7:14PM0.25m | 3:19AM0.14m | 7:46PM0.20m | 4:58AM0.14m | 8:14PM0.15m | ||||||||
 | |  |  | |  | | | | | | | | | | |  |  | | | | |
 | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — |
 | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 1 | — | — | — |
Temp °C | 27 | 27 | 26 | 28 | 28 | 27 | 28 | 28 | 27 | 29 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 28 | 29 | 27 |
Feels °C | 30 | 30 | 29 | 30 | 30 | 31 | 30 | 31 | 29 | 32 | 31 | 31 | 32 | 32 | 31 | 30 | 31 | 32 | 30 | 33 | 30 |
Swell 1 Height (m) Direction Period (s) | NNE 8 | NNE 6 | NE 8 | NE 8 | NNE 5 | NNE 6 | NE 7 | SSW 15 | NNE 7 | S 14 | NE 7 | SSW 14 | NE 7 | NE 7 | NNE 6 | NE 7 | NE 7 | NNE 7 | SW 9 | ENE 12 | ENE 12 |
| kJ | 101 | 58 | 113 | 33 | 33 | 44 | 104 | 45 | 93 | 16 | 118 | 18 | 88 | 118 | 49 | 93 | 91 | 41 | 52 | 119 | 220 |
Swell 2 Height (m) Direction Period (s) | SW 15 | NE 8 | SSW 14 | SSW 18 | NE 8 | NE 8 | SSW 16 | W 10 | SSW 15 | W 9 | SSW 14 | E 13 | S 13 | SSW 10 | SSW 10 | SSW 10 | SW 9 | SW 9 | E 13 | SW 9 | NNE 7 |
| kJ | 33 | 28 | 19 | 31 | 41 | 33 | 50 | 8 | 42 | 2 | 19 | 3 | 14 | 20 | 56 | 63 | 41 | 55 | 84 | 43 | 61 |
Swell 3 Height (m) Direction Period (s) | SSW 11 | SSW 14 | SSW 19 | W 12 | SSW 18 | SSW 16 | W 11 | SW 13 | W 10 | SW 13 | W 9 | W 9 | S 11 | SSW 13 | ENE 13 | NNE 11 | NNE 10 | E 13 | NE 8 | NE 8 | WSW 9 |
| kJ | 11 | 20 | 36 | 11 | 31 | 51 | 9 | 7 | 8 | 7 | 2 | 2 | 9 | 32 | 33 | 23 | 21 | 85 | 21 | 15 | 32 |
Wind waves Height (m) Direction Period (s) | — | — | — | NNE 7 | — | — | — | NE 7 | — | NE 7 | — | NE 7 | — | — | — | — | — | — | NNE 6 | NNE 6 | — |
| kJ | — | — | — | 70 | — | — | — | 104 | — | 106 | — | 121 | — | — | — | — | — | — | 32 | 41 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 4 | 4 | 4 | 18 | 4 | 20 | 100 | 4 | 4 | 4 | 14 | 4 | 4 | 100 | 20 | 100 | 100 | 4 | 100 | 14 | 14 |
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)
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