Surf Forecasts:
Waimanalo surf forecast from 29 Jul 2026:
- Most powerful swell: Tuesday 28 Jul, 11PM (local time) - 7ft (2.1m), 12s period, E swell with 1,269 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.1m 12s and forecast to arrive on Tuesday (Jul 28) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 15s period and expected on Wednesday (Jul 29) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Tue 28th Jul) | 7ft (2.1m) 12s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright, Rusty here again, this time in feet and miles. Let’s break down the next couple of weeks at Waimanalo.
Straight up – this is a rough stretch. The whole 16-day window is filled with "poor surf conditions" or marginal calls. No real standout days. The water’s about 80°F, which is normal for this time of year, so at least it’s warm disappointment.
Starting Tuesday the 28th of July, we get a wave height of 7ft from the east with a 13-second period. Combined energy is 1847 (moderate to strong). Sounds nice, but a 25 mph cross-onshore from the NNE has it a choppy mess.
Wednesday the 29th drops to 7ft in the morning, still cross-onshore. By the afternoon, the wind turns onshore but drops to just 10 mph, and the swell backs off to 5ft from the ENE at 10 seconds. It’s called “marginal” but with those lighter winds, that’s probably the cleanest it gets all week. Still nothing to write home about.
From Thursday the 30th through Sunday the 2nd of August, it’s a grind. Waves between 5ft and 8ft, but the wind cranks up to 25 to 30 mph out of the ENE. It’s lumpy, messy, and at times the combined energy hits 1054 – that's strong, but with the onshore wind, you’d be better off on a kite. For beginners, anything over 5ft is a handful; over 8ft is expert-only, but the conditions are so bad it doesn’t matter anyway.
From Monday the 3rd of August onward, it dies off quick. Swell drops under 3ft by the second week, with periods down to 6 or 7 seconds – weak, short-period windswell. The combined energy falls to as low as 109 by the 10th. The winds stay onshore or cross-onshore, and every single line says “poor.” From about the 5th of August through the end, there’s a solid week-plus with nothing worth paddling for.
For a break that’s usually fairly consistent, this is a real bummer. Keep the board handy, but don’t get your hopes up. Forecasts can flip, but right now? Hard pass.
- Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Tue night). Winds increasing (light winds from the E on Wed night, fresh winds from the ENE by Fri morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 25°C on Fri afternoon, min 24°C on Fri night). Winds decreasing (strong winds from the ENE on Fri night, moderate winds from the ENE by Mon morning). | |||||||||||||||||||
Tue 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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) | E 13 | ENE 11 | ENE 10 | ENE 10 | ENE 8 | ENE 8 | ENE 8 | E 7 | E 8 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 |
Wave Graph  | ||||||||||||||||||||
 kJ | 1609 | 1027 | 798 | 341 | 194 | 339 | 234 | 306 | 367 | 435 | 699 | 829 | 807 | 915 | 844 | 673 | 563 | 442 | 364 | 314 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | cross-on | cross-on | on | cross-on | cross-on | on | on | cross-on | on | on | on | on | on | on | on | on |
High Tide | 3:19PM0.66m | 1:31AM0.33m | 3:44PM0.66m | 2:12AM0.34m | 4:07PM0.66m | 2:57AM0.35m | 4:27PM0.64m | 3:46AM0.36m | 4:44PM0.61m | 4:42AM0.37m | 4:58PM0.57m | 5:48AM0.38m | 5:09PM0.52m | |||||||
Low Tide | 9:42PM0.21m | 7:59AM-0.05m | 10:06PM0.20m | 8:32AM-0.04m | 10:31PM0.18m | 9:04AM-0.01m | 10:57PM0.16m | 9:37AM0.05m | 11:22PM0.13m | 10:12AM0.11m | 11:50PM0.10m | 10:52AM0.19m | 00:22AM0.07m | |||||||
 |  |  | |  | | | | | | | | | | | | | | | | |
 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — |
 | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 25 | 26 | 25 | 26 | 27 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 25 | 26 | 27 | 27 | 27 | 27 | 25 | 24 | 22 | 22 | 21 | 21 | 21 | 21 | 22 | 22 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | E 13 | ENE 11 | ENE 10 | NE 9 | ENE 8 | SSW 13 | S 13 | E 16 | E 15 | E 16 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 12 |
| kJ | 1609 | 1027 | 798 | 275 | 194 | 60 | 55 | 81 | 159 | 231 | 205 | 202 | 196 | 196 | 196 | 200 | 189 | 179 | 229 | 314 |
Swell 2 Height (m) Direction Period (s) | S 14 | S 13 | S 15 | ENE 10 | NNE 7 | SW 18 | E 18 | S 13 | N 9 | N 8 | N 8 | SSW 14 | N 11 | N 10 | N 9 | N 9 | N 8 | S 13 | SSW 12 | SSW 12 |
| kJ | 33 | 30 | 67 | 341 | 117 | 12 | 24 | 30 | 13 | 12 | 11 | 19 | 9 | 17 | 14 | 13 | 12 | 3 | 15 | 14 |
Swell 3 Height (m) Direction Period (s) | — | S 15 | — | S 14 | S 14 | E 19 | N 9 | N 9 | S 12 | S 12 | S 12 | S 11 | S 11 | SSW 14 | SSW 14 | SW 13 | S 13 | SW 13 | S 13 | S 13 |
| kJ | — | 18 | — | 65 | 62 | 29 | 7 | 14 | 27 | 26 | 11 | 10 | 9 | 19 | 19 | 7 | 14 | 7 | 3 | 3 |
Wind waves Height (m) Direction Period (s) | NNE 9 | NNE 9 | — | — | — | ENE 8 | ENE 8 | E 7 | E 8 | E 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 9 | ENE 9 | ENE 9 | ENE 9 |
| kJ | 238 | 186 | — | — | — | 339 | 234 | 306 | 367 | 435 | 699 | 829 | 807 | 915 | 844 | 673 | 563 | 442 | 364 | 311 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 9 | 9 | 7 | 9 | 15 | 44 | 44 | 50 | 56 | 116 | 138 | 116 | 52 | 50 | 146 | 46 | 15 | 46 | 15 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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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