Surf Forecasts:
Waimanalo surf forecast from 2 Sep 2026:
- Most powerful swell: Saturday 5 Sep, 8PM (local time) - 8ft (2.4m), 14s period, ENE swell with 2,140 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.4m 14s and forecast to arrive on Saturday (Sep 05) at 8PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 12s period and expected on Thursday (Sep 03) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8PM (Sat 5th Sep) | 8ft (2.4m) 14s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a look at what Waimanalo has in store over the next couple of weeks. Straight up, I gotta be honest with you – this is a rough period for paddle surfing. The wind is a major issue for most of the run, and the quality is just not there.
We’ve got a solid, consistent supply of swell coming in, but it’s all from the ENE. That’s straight onshore for Waimanalo, and it’s going to be blowing hard, 19 to 25 mph, chopping everything up. The wave energy ramps up significantly, hitting some big numbers like 1948 (strong to very strong wave energy) by September 5th with a very long period groundswell of 14 seconds. That kind of energy and period would be incredible for a point break or reef, but here in a beach break setup, it’s going to be a messy, blown-out wall. Honestly, this looks more interesting for kite surfing than paddle surfing.
Things don't start looking any better until we hit Monday, September 14th, and even then it’s just marginal. The water temperature is 81° which is bang on average for this time of year.
The only real window where a surfer might find something half-decent and clean is Monday, September 14th. We finally get the wind to drop. On Monday morning, the wind goes light and cross-shore from the SE at 6 mph. The swell is a solid 7 ft from the ENE with a nice long period of 11 seconds, and the energy is still strong at 1145. That’s a decent amount of water moving. The afternoon cleans up even more with the wind dropping to a slight air from the ESE at 3 mph, with the swell at 8 ft and a period of 11 seconds, energy at 1391. This is your standout. It's the only time the wind is light and the swell is still pumping. For a Monday, crowds should be manageable, but Waimanalo is popular, so expect some company.
The rest of the run is a write-off. Strong onshore winds ruin the surf every other day. September 7th offers a slight glimmer with a smaller 7 ft ENE swell and light cross-shore wind in the afternoon, but it’s still not clean, just less messy.
Bottom line: Don't bother for the next week and a half. Save your energy for Monday, September 14th. That’s the day to be out there if you want the best of a not-so-great outlook. After that, we drop right back into knee-high dribble with no quality on the 16th. It’s a long wait, but that one Monday session could be alright.
Stay patient.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Tue night. Warm (max 26°C on Tue afternoon, min 25°C on Tue night). Mainly strong winds. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Sun afternoon. Warm (max 26°C on Sat morning, min 25°C on Fri afternoon). Winds decreasing (strong winds from the ENE on Fri afternoon, light winds from the E by Mon morning). | |||||||||||||||||||
Tue 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 14 | E 14 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 11 |
Wave Graph | ||||||||||||||||||||
441 | 527 | 539 | 536 | 528 | 529 | 558 | 607 | 543 | 482 | 649 | 1928 | 1942 | 1765 | 1661 | 1474 | 1360 | 1100 | 1121 | 1008 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | on | on | on | on | on | on | cross-on | cross | cross-on |
High Tide | 4:04PM0.47m | 7:03AM0.52m | 3:54PM0.43m | 9:02AM0.54m | 10:54AM0.59m | 11:56AM0.64m | 12:39PM0.68m | 11:21PM0.29m | 1:14PM0.70m | 00:23AM0.35m | ||||||||||
Low Tide | 11:19PM0.02m | 12:22PM0.33m | 00:03AM0.02m | 1:10AM0.03m | 2:48AM0.04m | 4:19AM0.02m | 8:00PM0.22m | 5:27AM-0.01m | 7:55PM0.20m | |||||||||||
— | — | 6:13 | — | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | |
6:46 | — | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | |
mm | — | 1 | 1 | — | — | — | — | — | — | — | — | — | 1 | 1 | 1 | 3 | 5 | 2 | 5 | — |
Temp °C | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 25 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 21 | 24 | 25 | 23 | 26 | 26 | 26 | 28 | 27 | 29 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | S 17 | S 16 | S 16 | E 13 | S 14 | SSE 12 | E 14 | E 14 | E 14 | E 14 | S 12 | SSW 12 | SSW 11 | SSW 11 | ENE 13 | ENE 12 | ENE 12 | ENE 12 | ENE 11 |
107 | 93 | 130 | 79 | 123 | 66 | 115 | 264 | 294 | 465 | 649 | 169 | 107 | 65 | 47 | 1474 | 1360 | 1100 | 1121 | 1008 | |
Swell 2 Height (m) Direction Period (s) | S 12 | S 10 | E 14 | E 14 | S 15 | SE 12 | E 12 | SSE 12 | SSE 12 | S 11 | S 12 | NNE 10 | NNE 10 | NNE 8 | N 8 | SW 11 | SSW 18 | NNE 7 | S 17 | S 15 |
11 | 8 | 33 | 66 | 69 | 36 | 107 | 152 | 147 | 125 | 172 | 20 | 19 | 20 | 10 | 30 | 109 | 35 | 146 | 116 | |
Swell 3 Height (m) Direction Period (s) | E 15 | E 14 | S 10 | S 11 | SSE 15 | SSE 14 | S 14 | N 9 | N 9 | N 12 | NNE 11 | SSW 17 | SSE 10 | SSE 12 | SSW 16 | SSW 19 | SW 11 | SSW 17 | SSE 9 | E 15 |
4 | 14 | 8 | 23 | 22 | 36 | 33 | 2 | 2 | 3 | 12 | 30 | 19 | 28 | 26 | 71 | 18 | 92 | 17 | 70 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | — | — | — | — | — |
441 | 527 | 539 | 536 | 528 | 529 | 558 | 607 | 543 | 482 | 394 | 1928 | 1942 | 1765 | 1661 | — | — | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 116 | 44 | 50 | 56 | 117 | 119 | 117 | 116 | 119 | 116 | 50 | 44 | 50 | 15 | 16 | 17 | 15 | 9 | 5 | 5 |
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.











