Surf Forecasts:
Kiholo Bay surf forecast from 14 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period, SW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 8PM (local time) - 1.5ft (0.4m), 13s period, WNW swell with 58 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 8PM (local time) - 1ft (0.3m), 16s period with SW swell.
Best Forecast Surf Conditions for Kiholo Bay this week:
The surf forecast for Kiholo Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 8PM. The primary swell is predicted to be 0.3m and 16s period with a secondary swell of 0.3m and 12s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Kiholo Bay in the next 16 days are 0.4m 13s and forecast to arrive on Tuesday (Aug 18) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 4.0m 8s period and expected on Saturday (Aug 15) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Best Surf | 8PM (Wed 19th Aug) | 1ft (0.3m) 16s |
| Most Powerful | 8PM (Tue 18th Aug) | 1.5ft (0.4m) 13s |
Table - best surf conditions forecast for Kiholo Bay over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s be straight with you. The next couple of weeks are looking pretty flat and quiet for Kiholo Bay. We’ve got a long stretch of tiny, weak surf, and it’s going to take some patience if you’re hoping for anything worth paddling out for.
The first real window where you might get a wave is around Thursday the 20th. Early that morning, there’s a hint of a longer-period swell from the southwest, but it’s still only around 1ft. The energy is building a bit (73), but it’s coming straight onshore with a light breeze, so it’s going to be messy. By the afternoon, the wind backs off to almost nothing and it goes glassy. That’s when it might turn into something surfable, but honestly, it’s just ordinary. That’s the one day in the whole run where a wave is rideable, and it’s barely a blip.
Before that, from the 14th through the 19th, it’s all under 1.3ft and basically flat. There’s a little pulse of energy on the 16th with a glassy morning, but the swell is too weak to do anything with. It’s the kind of conditions where you’re just staring at the horizon, waiting.
After that 20th, it drops right back down again. From the 21st through the 29th, we’re back to 1ft dribble. There are a few glassy afternoons, like the 23rd and the 25th, and the water temp is sitting about average for this time of year, so it’s not going to be a shock when you get in. But the waves just won't be there. The energy stays weak, all two-digit numbers, mostly in the teens and twenties.
One thing to keep an eye on: towards the end of the month, on the 27th, the period stretches out a bit and the energy ticks up to 47, but the swell direction is straight onshore and the height is still at 1.3ft. It’s a tease, not a treat.
So, here’s the deal. If you’re a beginner, there’s nothing for you anyway. If you’re an expert, you’re still going to be bored. The only day that even gets a pass is the afternoon of Thursday the 20th. It’s clean and glassy, but the swell is tiny. Don’t get your hopes up. It’s a flat spell that looks like it wants to hang around, but forecasts can change – they always can. Stay tuned.
Short Range ForecastHeavy rain (total 54mm), heaviest during Sat night. Warm (max 30°C on Fri afternoon, min 25°C on Sat night). Winds decreasing (strong winds from the ESE on Sat night, calm by Sun night). | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Mon morning. Warm (max 28°C on Mon morning, min 26°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
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 11 | W 12 | W 12 | W 11 | W 14 | NNE 8 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | WNW 13 | WNW 12 | WNW 12 | SW 16 | SW 18 | SW 17 | W 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 10 | 24 | 12 | 9 | 16 | 0 | 32 | 49 | 27 | 25 | 24 | 25 | 25 | 25 | 33 | 48 | 28 | 41 | 49 | 47 | 20 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross-off | cross-off | cross-on | on | on | glassy | on | cross-on | glassy | glassy | cross | cross | cross-on | cross-on | glassy | on | glassy | glassy |
High Tide | 5:01PM0.75m | 5:39AM0.57m | 5:30PM0.66m | 6:25AM0.59m | 5:55PM0.57m | 7:15AM0.60m | 6:17PM0.49m | 8:14AM0.60m | 6:29PM0.41m | 9:26AM0.60m | 10:50AM0.61m | ||||||||||
Low Tide | 10:32AM0.11m | 11:36PM0.08m | 11:20AM0.18m | 00:02AM0.08m | 12:11PM0.25m | 00:27AM0.10m | 1:12PM0.31m | 00:52AM0.12m | 2:39PM0.36m | 1:22AM0.14m | 2:03AM0.16m | 3:10AM0.18m | |||||||||
 | |  |  |  | |  |  |  | | | | | |  | | | | | |  | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — |
mm | — | — | 1 | 2 | 11 | 30 | — | 3 | 7 | 2 | 2 | 1 | — | 2 | — | — | — | — | — | — | — |
Temp °C | 29 | 30 | 28 | 28 | 28 | 27 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 27 | 27 | 27 | 28 | 28 | 27 |
Feels °C | 29 | 31 | 31 | 28 | 26 | 30 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 31 | 31 | 31 | 30 | 32 | 31 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | NE 8 | SSW 14 | SSW 13 | SSW 13 | NNE 8 | NE 8 | NE 8 | NE 8 | NE 6 | NE 6 | NE 5 | WNW 11 | NNE 5 | NNE 5 | NE 5 | NNE 5 | NNE 7 | NNE 6 | NE 6 | NNE 7 |
| kJ | 41 | 18 | 36 | 35 | 35 | 199 | 129 | 91 | 67 | 60 | 47 | 22 | 25 | 13 | 11 | 12 | 9 | 29 | 26 | 32 | 32 |
Swell 2 Height (m) Direction Period (s) | W 11 | SSW 14 | W 12 | ENE 10 | W 11 | ENE 9 | SSW 7 | SW 6 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | ENE 8 | WNW 11 | WNW 13 | WNW 12 | NNE 7 | WNW 11 | SW 18 | WNW 11 | SW 16 |
| kJ | 10 | 40 | 11 | 20 | 10 | 154 | 9 | 19 | 27 | 25 | 24 | 25 | 6 | 25 | 33 | 48 | 9 | 25 | 49 | 23 | 69 |
Swell 3 Height (m) Direction Period (s) | S 18 | W 12 | SW 17 | W 11 | W 14 | SSW 7 | WNW 13 | WNW 12 | WSW 5 | WSW 5 | S 14 | S 13 | SSW 17 | ENE 8 | W 7 | NNE 8 | WNW 12 | SW 16 | WNW 11 | SW 17 | W 11 |
| kJ | 6 | 24 | 12 | 9 | 16 | 17 | 32 | 49 | 5 | 2 | 16 | 14 | 28 | 6 | 4 | 6 | 28 | 41 | 24 | 47 | 20 |
Wind waves Height (m) Direction Period (s) | NE 6 | NNE 6 | NE 6 | NE 8 | NE 8 | — | — | — | — | — | — | — | NNE 5 | — | — | — | — | — | — | — | — |
| kJ | 72 | 77 | 131 | 291 | 423 | — | — | — | — | — | — | — | 15 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 99 | 14 | 14 | 111 | 14 | 22 | 95 | 23 | 26 | 94 | 94 | 43 | 99 | 88 | 84 | 94 | 99 | 12 | 21 | 0 | 21 |
Best forecast wave conditions in Big Island | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Kiholo Bay Surf forecast
The above surf forecast table for Kiholo Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kiholo Bay can be found by selecting the local surf guide option on the grey menu. Our Kiholo 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 (Kiholo 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 Kiholo 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.
Kiholo Bay is 89 km (55 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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