Surf Forecasts:
Kiholo Bay surf forecast from 13 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 8PM (local time) - 1.5ft (0.4m), 12s period, WNW swell with glassy winds.
- Most powerful swell: Tuesday 18 Aug, 11PM (local time) - 1.5ft (0.4m), 13s period, WNW swell with 57 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 8PM (local time) - 1.5ft (0.4m), 12s period with WNW 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 0.4m and 12s period. 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 11PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.5m 8s period and expected on Saturday (Aug 15) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Wed 19th Aug) | 1.5ft (0.4m) 12s |
| Best Surf | 8PM (Wed 19th Aug) | 1.5ft (0.4m) 12s |
| Most Powerful | 11PM (Tue 18th Aug) | 1.5ft (0.4m) 13s |
Table - best surf conditions forecast for Kiholo Bay over the next 16 days.
The Lowdown
Alright, let’s talk about Kiholo Bay for the next couple weeks. Straight up, it’s flat. From now all the way through Friday, August 28th, we’re looking at a long stretch of minimal waves. The total wave energy across the whole period is weak, barely ever cracking 50.
We’ve got a big gap right from the start. Thursday and Friday the 13th and 14th are a write-off – tiny, messy slop with cross-shore winds ruining any chance of a wave. Nothing to ride.
Saturday the 15th morning is dead flat, though glassy. The afternoon sees a tiny 0.7ft W swell creep in, still glassy, but it’s more of a ripple than a wave. This pattern sticks all through the next week. There are a few glassy moments – Monday afternoon the 17th, Tuesday afternoon the 18th, and Thursday afternoon the 20th – but the swell is stuck between 0.7ft and 1ft. On that Thursday afternoon, the energy finally bumps up to 70 (moderate), but the wave comment is just “surfable but ordinary” – a 1 out of 10. You’d be lucky to find a knee-high lump.
The second week is even weaker. From the 21st to the 28th, it’s all 0.7ft to 1ft swells, with periods between 10 and 16 seconds, and energy mostly below 50. Even the glassy mornings on the 25th and 27th do nothing because there’s zero push.
No standouts here. The closest thing to a highlight is Thursday afternoon the 20th. That swell swings to a long-period 18-second groundswell from the SW, which isn’t bad, but the size is only 1ft. Kiholo Bay is a beach and point setup, and with that long period on such a tiny wave, it’ll just slide past without breaking. Water temp is about normal for the time of year.
Honestly, this is a dead run. For this spot in the summer, a blank spell like this is pretty normal. It won’t stay poor forever, and forecasts can change, but right now, there’s nothing worth a drive.
Rusty.
Short Range ForecastModerate rain (total 12mm), heaviest on Sat night. Warm (max 29°C on Thu morning, min 26°C on Thu night). Winds increasing (light winds from the NNE on Thu morning, strong winds from the ENE by Sat night). | Days 4-6 Weather SummaryHeavy rain (total 39mm), heaviest during Sun morning. Warm (max 29°C on Sun afternoon, min 26°C on Sun morning). Wind will be generally light. | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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) | WNW 12 | W 12 | W 12 | NNE 6 | W 12 | W 12 | W 11 | NE 8 | WNW 13 | WNW 13 | WNW 12 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 13 | WNW 13 | WNW 12 | WNW 12 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 28 | 25 | 11 | 0 | 24 | 11 | 9 | 0 | 34 | 31 | 49 | 27 | 25 | 24 | 24 | 25 | 31 | 55 | 48 | 48 | 41 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-off | cross-on | cross | cross | cross-off | cross-off | cross-off | cross | cross-on | glassy | on | glassy | glassy | glassy | glassy | glassy | glassy | cross | glassy |
High Tide | 4:30PM0.83m | 4:54AM0.53m | 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 | |||||||||
Low Tide | 9:44AM0.06m | 11:11PM0.08m | 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 | ||||||||
 | |  | | | | | |  |  | | | |  |  | | |  |  | | | |
 | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | — | 6:50 | — | — | 6:49 | — |
mm | — | — | — | — | — | — | — | — | 12 | 31 | — | — | 1 | 4 | 1 | — | 2 | — | — | 2 | 1 |
Temp °C | 29 | 29 | 27 | 28 | 29 | 28 | 29 | 29 | 28 | 28 | 29 | 28 | 28 | 28 | 27 | 28 | 28 | 27 | 27 | 26 | 26 |
Feels °C | 30 | 30 | 28 | 28 | 29 | 30 | 30 | 32 | 31 | 31 | 31 | 32 | 33 | 32 | 32 | 32 | 33 | 31 | 31 | 30 | 31 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | NNE 6 | SSW 14 | NNE 6 | SSW 14 | SSW 13 | ENE 10 | NE 8 | NE 8 | NE 8 | NE 8 | NE 7 | NE 6 | NE 6 | NNE 5 | NNE 5 | NNE 5 | NNE 5 | NE 7 | NNE 6 | NNE 7 |
| kJ | 48 | 57 | 70 | 40 | 40 | 35 | 33 | 163 | 187 | 129 | 91 | 77 | 47 | 52 | 24 | 17 | 19 | 13 | 22 | 13 | 19 |
Swell 2 Height (m) Direction Period (s) | WNW 12 | SSW 15 | W 12 | NE 8 | W 12 | ENE 10 | SSW 13 | ENE 10 | WNW 13 | WNW 13 | SSW 7 | WNW 12 | WNW 11 | WNW 11 | WNW 11 | WNW 11 | W 11 | WNW 13 | WNW 12 | WNW 12 | WNW 11 |
| kJ | 28 | 44 | 11 | 16 | 24 | 20 | 35 | 31 | 34 | 31 | 19 | 27 | 25 | 24 | 24 | 25 | 22 | 55 | 48 | 48 | 25 |
Swell 3 Height (m) Direction Period (s) | SSW 12 | W 12 | S 18 | SSW 14 | SW 17 | W 12 | W 11 | SSW 13 | SSW 13 | SSW 13 | WNW 12 | SW 5 | SSW 12 | SSW 14 | ENE 8 | ENE 7 | W 13 | ENE 7 | SSW 16 | SW 16 | SW 16 |
| kJ | 28 | 25 | 6 | 41 | 12 | 11 | 9 | 35 | 18 | 33 | 49 | 1 | 14 | 20 | 6 | 5 | 31 | 5 | 25 | 42 | 41 |
Wind waves Height (m) Direction Period (s) | NE 5 | — | NNE 6 | — | NE 6 | NNE 7 | NE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | NNE 4 |
| kJ | 27 | — | 53 | — | 102 | 145 | 282 | — | — | — | — | — | — | — | — | — | — | — | — | — | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 14 | 99 | 22 | 26 | 22 | 26 | 14 | 111 | 14 | 22 | 43 | 90 | 26 | 90 | 94 | 26 | 94 | 102 | 84 | 21 | 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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