
Surf Forecasts:
Makapu'u surf forecast from 12 Aug 2026:
- Best quality surf: Sunday 16 Aug, 8PM (local time) - 21ft (6.5m), 11s period, ENE swell with cross-shore winds.
- Most powerful swell: Sunday 16 Aug, 8PM (local time) - 21ft (6.5m), 11s period, ENE swell with 9,917 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 8PM (local time) - 21ft (6.5m), 11s period with ENE swell.
Best Forecast Surf Conditions for Makapu'u this week:
The surf forecast for Makapu'u over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 8PM. The primary swell is predicted to be 6.5m and 11s period with a secondary swell of 0.6m and 13s. Another secondary swell of 0.6m and 16s is also forecast. The wind is predicted to be cross-shore as the swell arrives.
The most powerful waves expected at Makapu'u in the next 16 days are 6.5m 11s and forecast to arrive on Sunday (Aug 16) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Tuesday (Aug 18) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 16th Aug) | 21ft (6.5m) 11s |
| Best Surf | 8PM (Sun 16th Aug) | 21ft (6.5m) 11s |
| Most Powerful | 8PM (Sun 16th Aug) | 21ft (6.5m) 11s |
Table - best surf conditions forecast for Makapu'u over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down the coming swell window for the Island.
First, honesty time. Right now, the surf is not doing us any favours. The whole 16-day stretch is pretty much a write-off for quality waves, so I’m not going to sugarcoat it. We’re looking at a long, dry gap with nothing worth paddling for. The first lineup worth even mentioning doesn’t turn up until 17 August, and even then, it’s on the edge.
So, here’s the situation. The wind is a constant problem. Almost every day, we’re dealing with a moderate to fresh onshore breeze, mostly from the east-northeast. That’s just blowing the surface to bits. The swell is mostly weak and short-period, with some exceptions but they’re all ruined by the wind.
The only real standout – and I’m using that word lightly – comes on 15 August. Saturday morning, Makapu’u (Oahu) sees a 8 ft swell from the east-northeast, with a period of 12 seconds. That’s a moderate groundswell, carrying some real energy (2259). The problem? The wind is still blowing onshore at 25 mph. That’s a strong breeze, and it’s going to be messy. The wave energy is too high for beginners, and the wind is making it a challenge for everyone. This is a session for experienced surfers only, and even then, you’ll be fighting the wind. The combined energy is strong (2259), but it’s not a clean day.
Then, 16 August, Sunday, the swell pumps up to 13 ft from the east-northeast, with a 12-second period and a massive 4242 combined energy. That is very strong. But the wind switches to a cross-onshore from the east-southeast, and then a cross-shore from the southeast. The water is going to be a washing machine, straight up. This is more of a kite-surfing setup than a paddle surf day. Not for beginners – that’s 13 ft, for experts only, but the quality is poor.
The water temperature sits at 81°, which is a normal 0.7° anomaly, so pretty average for this time of year.
The only other window that might be worth a look is 17 August, Monday morning. The swell drops to 8 ft, period is a short 8 seconds, and the combined energy is moderate (1187). The wind is an onshore moderate breeze at 12 mph. The forecast calls it marginal, and I’d agree. It’s not a total loss, but it’s not a day to plan your week around.
After that, from 18 August to 26 August, we’re back to the same story: 3 ft to 6 ft of short-period, onshore wind swell. The energy stays weak to moderate (262 to 1343), and the wind is relentless. The only change is a pulse of longer-period swell from the south and south-southwest around 23-26 August, with periods up to 17 seconds, and combined energy getting into the strong range (1225 to 1343). But again, the wind is onshore, so it’s going to be chopped up and tough to enjoy.
Honestly, if you’re looking to surf, don’t hold your breath. This is a blank run for the region. It’s one of those stretches where the forecasts can change, but right now, it’s a lean period. The best advice I can give is to check back in a few days.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Tue morning, min 25°C on Tue night). Mainly fresh winds. | Days 4-6 Weather SummaryHeavy rain (total 52mm), heaviest during Sun morning. Warm (max 27°C on Sun afternoon, min 25°C on Fri afternoon). Winds decreasing (severe gales from the NE on Sat night, light winds from the SE by Sun night). | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | ENE 7 | SSW 14 | S 20 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | ENE 7 | ENE 8 | ENE 9 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | |||||||||||||||||||||
186 | 269 | 268 | 509 | 613 | 520 | 501 | 653 | 537 | 431 | 471 | 791 | 1979 | 2543 | 3912 | 3876 | 4000 | 2675 | 820 | 612 | 489 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | cross | cross-on | on | on | on |
High Tide | 2:50PM0.74m | 1:43AM0.37m | 3:21PM0.72m | 2:36AM0.40m | 3:49PM0.69m | 3:28AM0.42m | 4:12PM0.63m | 4:22AM0.43m | 4:30PM0.58m | 5:20AM0.44m | 4:40PM0.52m | 6:27AM0.44m | 4:40PM0.47m | ||||||||
Low Tide | 9:16PM0.20m | 7:57AM-0.08m | 9:41PM0.17m | 8:39AM-0.03m | 10:07PM0.14m | 9:20AM0.03m | 10:33PM0.12m | 10:00AM0.11m | 10:59PM0.09m | 10:41AM0.19m | 11:25PM0.08m | 11:25AM0.27m | 11:52PM0.07m | ||||||||
6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | |
— | 7:02 | — | — | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | 8 | 29 | 6 | 7 | 1 | — | — |
Temp °C | 26 | 26 | 25 | 25 | 25 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 27 | 26 | 26 | 25 |
Feels °C | 26 | 24 | 23 | 23 | 22 | 24 | 24 | 23 | 22 | 23 | 23 | 22 | 23 | 23 | 21 | 22 | 25 | 26 | 27 | 26 | 23 |
Swell 1 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | S 18 | S 18 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 14 | S 16 | S 13 | S 14 | ENE 8 | ENE 8 | ENE 8 |
165 | 269 | 243 | 509 | 613 | 520 | 501 | 653 | 537 | 411 | 411 | 302 | 280 | 168 | 181 | 329 | 171 | 249 | 820 | 612 | 489 | |
Swell 2 Height (m) Direction Period (s) | SSW 11 | SSE 9 | S 20 | SSW 13 | SSW 13 | SSW 13 | SSW 12 | NNW 8 | NNW 7 | W 12 | SSW 18 | NNW 8 | NNW 8 | S 16 | S 18 | W 12 | S 16 | S 16 | S 14 | SSE 7 | S 13 |
41 | 16 | 268 | 218 | 218 | 222 | 113 | 6 | 5 | 11 | 30 | 6 | 7 | 79 | 99 | 25 | 127 | 81 | 268 | 79 | 170 | |
Swell 3 Height (m) Direction Period (s) | SSE 9 | S 21 | W 13 | W 13 | W 12 | W 12 | W 12 | W 12 | W 11 | NNW 7 | NNW 8 | SSW 17 | W 11 | W 13 | W 13 | SSW 19 | W 12 | W 11 | SW 18 | S 14 | SSE 6 |
16 | 79 | 30 | 30 | 25 | 11 | 11 | 11 | 10 | 5 | 6 | 28 | 9 | 29 | 30 | 37 | 25 | 10 | 50 | 257 | 25 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | E 7 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 12 | ENE 12 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | SSE 7 | — | — |
186 | 186 | 196 | 182 | 212 | 200 | 252 | 260 | 385 | 431 | 471 | 791 | 1979 | 2543 | 3912 | 3876 | 4000 | 2675 | 99 | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 49 | 49 | 49 | 49 | 55 | 49 | 49 | 110 | 49 | 60 | 113 | 149 | 217 | 217 | 134 | 110 | 109 | 42 | 42 | 49 | 49 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Makapu'u Surf forecast
The above surf forecast table for Makapu'u provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Makapu'u can be found by selecting the local surf guide option on the grey menu. Our Makapu'u 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 (Makapu'u) 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 Makapu'u 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.
Makapu'u is 13 km (8 miles) from the city of Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











