Surf Forecasts:
Waimanalo surf forecast from 26 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 2AM (local time) - 10ft (3.0m), 12s period, ENE swell with cross-onshore winds.
- Most powerful swell: Wednesday 29 Jul, 2AM (local time) - 10ft (3.0m), 12s period, ENE swell with 2,250 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 2AM (local time) - 10ft (3.0m), 12s period with ENE swell.
Best Forecast Surf Conditions for Waimanalo this week:
The surf forecast for Waimanalo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Jul 29) at 2AM. The primary swell is predicted to be 3.0m and 12s period with a secondary swell of 1.3m and 6s. The wind is predicted to be cross-onshore as the swell arrives.
The most powerful waves expected at Waimanalo in the next 16 days are 3.0m 12s and forecast to arrive on Wednesday (Jul 29) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 18s period and expected on Sunday (Jul 26) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 29th Jul) | 10ft (3.0m) 12s |
| Best Surf | 2AM (Wed 29th Jul) | 10ft (3.0m) 12s |
| Most Powerful | 2AM (Wed 29th Jul) | 10ft (3.0m) 12s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Hey, Rusty here. Let’s talk Waimanalo. It’s a rough forecast, plain and simple. We’re looking at a long stretch of flat or poor conditions right from the start, and the first real glimmer of hope doesn't show up until Wednesday, July 29th.
From Sunday the 26th through Tuesday the 28th, forget it. Onshore winds are howling at 15 to 22 mph, and the small, short-period swell (5-second range) is making for messy, weak waves. The wave energy is moderate (678 to 1979) but it’s all chop and no shape. Not worth getting wet.
Wednesday morning the 29th is the only thing that catches my eye. The swell jumps to 10 ft from the east-northeast with a 11-second period, bringing strong energy (2017). The wind is light, around 6 mph from the north-northeast, but it’s cross-onshore. The catch? That size is likely too big for this beginner-friendly break. If you’re an advanced surfer, you might get a few, but it’s expert territory. Later that afternoon it drops to 8 ft, but it’s marginal.
After that, it’s back to the grind. Thursday the 30th through the weekend is poor – onshore winds (12 to 28 mph) and short-period swell. On Friday the 31st, we’ve got 7 ft of 5-second sludge, with fresh onshore winds. By Saturday August 1st, it’s 8 ft and a strong breeze at 28 mph – that’s kite-surfing conditions, not a smooth paddle session. This pattern drags through Monday August 4th. Water temp is about normal for this time of year.
The second week, from August 5th to the 10th, offers very little. There’s a small window on Sunday August 9th in the afternoon: 7 ft, 5-second period, light breeze (9 mph). The guidance calls it marginal, and the combined energy is still only moderate (579). Cross-onshore wind and chop are still the main story. Crowds are always possible at Waimanalo, but the crummy surf will keep most people away.
If you absolutely have to pick something, Wednesday morning the 29th is the only day with size and power, but it’s not a beginner-friendly wave. For everyone else, it’s a two-week stretch of onshore wind and short-period junk. Keep your board in the car and don’t drive with high hopes.
Rusty.
Short Range ForecastLight rain (total 5mm), mostly falling on Mon night. Warm (max 26°C on Tue afternoon, min 24°C on Sat night). Mainly strong winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Tue night). Winds increasing (light winds from the NNE on Wed afternoon, fresh winds from the ENE by Fri morning). | ||||||||||||||||||
Sunday 26 | Monday 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | ||||||||||||||
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 8 | ENE 8 | E 15 | E 15 | E 14 | E 13 | E 14 | E 13 | E 13 | ENE 12 | ENE 11 | NE 10 | ENE 9 | ENE 8 | ENE 8 | E 7 | E 8 | E 7 | E 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 477 | 403 | 418 | 602 | 640 | 690 | 1433 | 1370 | 1838 | 2250 | 2017 | 1370 | 254 | 418 | 324 | 416 | 504 | 491 | 601 |
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 | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on |
High Tide | 10:51PM0.28m | 2:25PM0.63m | 00:03AM0.30m | 2:52PM0.65m | 00:49AM0.31m | 3:19PM0.66m | 1:31AM0.33m | 3:44PM0.66m | 2:12AM0.34m | 4:07PM0.66m | 2:57AM0.35m | 4:27PM0.64m | 3:46AM0.36m | ||||||
Low Tide | 9:26PM0.24m | 6:12AM-0.02m | 9:10PM0.23m | 6:51AM-0.04m | 9:22PM0.23m | 7:26AM-0.05m | 9:42PM0.21m | 7:59AM-0.05m | 10:06PM0.20m | 8:32AM-0.04m | 10:31PM0.18m | 9:04AM-0.01m | 10:57PM0.16m | ||||||
 |  | |  | | |  |  | | | |  | | | | | | | | |
 | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 7:13 | — | 7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — |
mm | — | — | — | — | — | — | 3 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 26 | 26 | 27 | 26 | 25 | 25 | 25 |
Feels °C | 21 | 21 | 22 | 22 | 23 | 24 | 24 | 25 | 26 | 25 | 27 | 29 | 30 | 28 | 28 | 25 | 23 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | E 15 | E 15 | E 15 | E 14 | E 13 | E 14 | E 13 | E 13 | ENE 12 | ENE 11 | NE 10 | ENE 9 | SSW 13 | S 13 | E 17 | E 16 | E 15 | E 15 |
| kJ | 103 | 275 | 418 | 602 | 640 | 690 | 1433 | 1370 | 1838 | 2250 | 2017 | 1370 | 254 | 60 | 55 | 135 | 174 | 213 | 205 |
Swell 2 Height (m) Direction Period (s) | E 15 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | S 14 | S 14 | S 13 | SSW 15 | S 14 | N 7 | SW 18 | E 18 | S 13 | S 12 | S 12 | N 8 |
| kJ | 72 | 90 | 85 | 83 | 73 | 42 | 41 | 32 | 32 | 30 | 71 | 65 | 131 | 12 | 56 | 53 | 27 | 26 | 11 |
Swell 3 Height (m) Direction Period (s) | E 12 | S 10 | S 11 | SE 11 | S 11 | S 11 | S 11 | S 10 | — | S 15 | S 15 | S 20 | S 14 | E 19 | N 9 | N 9 | N 9 | N 8 | S 12 |
| kJ | 47 | 9 | 9 | 5 | 2 | 2 | 2 | 7 | — | 18 | 71 | 7 | 62 | 29 | 6 | 14 | 13 | 12 | 11 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 7 | NE 7 | NE 7 | NNE 7 | NNE 7 | NNE 6 | NNE 6 | — | — | — | ENE 8 | ENE 8 | E 7 | E 8 | E 7 | E 8 |
| kJ | 477 | 403 | 372 | 320 | 301 | 322 | 191 | 191 | 141 | 132 | — | — | — | 418 | 324 | 416 | 504 | 491 | 601 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 44 | 50 | 50 | 44 | 44 | 44 | 15 | 15 | 46 | 9 | 7 | 7 | 5 | 9 | 14 | 44 | 50 | 52 | 52 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Waimanalo Surf forecast
The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.
Waimanalo is 7 km (4 miles) from 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.
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