Surf Forecasts:
Waimanalo surf forecast from 13 Jul 2026:
- Most powerful swell: Monday 13 Jul, 2AM (local time) - 6.5ft (2.0m), 8s period, ENE swell with 459 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.0m 8s and forecast to arrive on Monday (Jul 13) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 16s period and expected on Monday (Jul 13) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Mon 13th Jul) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
Alright, folks, Rusty here. Let’s break down what’s coming. Gotta be honest: the next couple of weeks are a real grind. Don’t be in a hurry to wax up.
Right from the start, Monday the 13th, we’ve got a 6ft swell from the ENE, but it’s getting wrecked by a 19 mph onshore wind. That’s just a mess. The combined energy is weak to moderate (345), and the period is short at 8 seconds. Not worth the paddle at Waimanalo. This same crummy pattern sticks around for days. Tuesday the 14th through the weekend? More of the same: 4ft to 5ft swell, but the wind is blowing onshore or cross-onshore with a moderate to fresh breeze. The combined energy stays in the low to mid 200s, and the period is a short 6 to 8 seconds. It’s choppy, lumpy, and just poor surf conditions.
We do get a little bump in size toward the end of the window. Check out Thursday the 24th: the swell holds at 6ft to 6ft from the ENE, with a moderate breeze. The combined energy jumps to 476 and then 530 on the 25th. That’s moderate wave energy, and the period is still short at 7 to 8 seconds. But the wind is still onshore, so it’s a fight. The water temp is about average for this time of year.
The real standout, if you’re willing to wait, is Monday the 27th. The swell drops to 3ft but the period jumps to 14 seconds—that’s a proper groundswell. The combined energy is strong at 764. But the wind is still a fresh 19 mph onshore from the ENE. That’s a shame because that long period would be magic at a reef or point break, but here it’s just a clean-up set in the wind. Then Tuesday the 28th, we see a 6ft swell from the ENE with a 12-second period and a massive combined energy of 1138. That’s strong wave energy, but the wind is a fresh 22 mph onshore. That’s expert territory for size, but the wind is just too much.
There’s a big gap of over a week of nothing really worth chasing. The surf just isn’t cooperating. If you’re desperate, the 24th and 25th offer the biggest waves, but the conditions are still poor. Honestly, this setup looks more interesting for the kite surfers than paddle surfers, given the strong onshore wind and the consistent swell. As for the crowds at Waimanalo, when it’s good, it can get busy, but there’s no need to worry about that right now.
So, hold tight. The near-term is a write-off, and the long-range promise is blown out. It’s a tough run.
Rusty.
Short Range ForecastLight rain (total 8mm), mostly falling on Tue morning. Warm (max 25°C on Mon afternoon, min 24°C on Sun night). Winds decreasing (fresh winds from the ENE on Sun night, light winds from the E by Tue night). | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Wed night. Warm (max 25°C on Wed night, min 24°C on Wed night). Mainly fresh winds. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sun 19 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 7 | NE 8 | NE 7 | NE 7 | ENE 7 | ENE 7 | ENE 7 | E 6 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 6 | E 7 | E 8 | E 8 | E 7 | E 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 459 | 345 | 310 | 249 | 276 | 194 | 199 | 138 | 114 | 222 | 146 | 165 | 220 | 170 | 181 | 151 | 173 | 186 | 229 | 276 | 246 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | on | on | on |
High Tide | 00:11AM0.30m | 3:15PM0.77m | 1:17AM0.31m | 3:55PM0.76m | 2:18AM0.32m | 4:33PM0.73m | 3:19AM0.32m | 5:06PM0.69m | 4:23AM0.32m | 5:34PM0.63m | 5:36AM0.33m | 5:55PM0.57m | 7:07AM0.34m | 6:08PM0.51m | |||||||
Low Tide | 9:32PM0.24m | 7:16AM-0.15m | 10:02PM0.22m | 8:04AM-0.15m | 10:36PM0.21m | 8:49AM-0.11m | 11:10PM0.19m | 9:34AM-0.06m | 11:44PM0.16m | 10:16AM0.02m | 00:18AM0.13m | 10:57AM0.11m | 00:51AM0.11m | 11:40AM0.20m | |||||||
 |  | | |  | |  | | | |  | |  | | | | | | | | | |
 | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — |
 | 7:15 | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 |
mm | — | — | — | — | 1 | 2 | 2 | 2 | 1 | 4 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 21 | 21 | 23 | 22 | 23 | 23 | 23 | 25 | 25 | 25 | 24 | 24 | 25 | 23 | 23 | 25 | 24 | 23 | 24 | 24 | 23 |
Swell 1 Height (m) Direction Period (s) | SW 16 | SW 15 | SSW 15 | SSW 14 | SSW 14 | E 8 | SSW 17 | ENE 7 | NNE 8 | SSW 16 | NNE 7 | NNE 7 | SSW 17 | NNE 7 | SSW 16 | NNE 7 | NNE 7 | NNE 7 | NNE 8 | NNE 8 | NNE 8 |
| kJ | 39 | 36 | 21 | 20 | 19 | 42 | 29 | 138 | 77 | 48 | 43 | 42 | 29 | 29 | 49 | 29 | 37 | 43 | 32 | 22 | 23 |
Swell 2 Height (m) Direction Period (s) | SSE 12 | SSE 12 | SSE 12 | N 8 | SSW 19 | SSW 14 | SSW 13 | N 7 | SSE 10 | SSE 9 | SSW 16 | SSW 17 | SSW 13 | SSW 16 | SSW 9 | SSW 10 | SSW 14 | SSW 14 | S 12 | SSW 12 | SSW 12 |
| kJ | 14 | 14 | 13 | 6 | 36 | 18 | 16 | 27 | 9 | 8 | 25 | 29 | 16 | 24 | 7 | 20 | 36 | 39 | 27 | 28 | 14 |
Swell 3 Height (m) Direction Period (s) | W 12 | S 20 | S 6 | SSE 11 | SSE 11 | SSE 11 | SE 10 | SSW 13 | SSW 18 | W 16 | SSW 13 | SSE 8 | S 7 | SSW 9 | SSE 10 | SSW 15 | SSW 9 | SSE 8 | SSE 8 | S 19 | S 18 |
| kJ | 3 | 8 | 1 | 12 | 11 | 11 | 4 | 16 | 30 | 19 | 17 | 6 | 4 | 9 | 9 | 42 | 16 | 6 | 7 | 29 | 27 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 7 | NE 8 | NE 7 | NE 7 | — | ENE 7 | ENE 7 | E 6 | ENE 6 | ENE 7 | ENE 6 | ENE 6 | E 6 | E 7 | E 8 | E 8 | E 7 | E 7 |
| kJ | 459 | 345 | 310 | 249 | 276 | 194 | 199 | — | 114 | 222 | 146 | 165 | 220 | 170 | 181 | 151 | 173 | 186 | 229 | 276 | 246 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 46 | 44 | 45 | 15 | 15 | 18 | 15 | 44 | 44 | 5 | 44 | 50 | 44 | 45 | 50 | 44 | 45 | 50 | 17 | 44 | 118 |
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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