
Surf Forecasts:
Kailua Beach surf forecast from 14 Sep 2026:
- Most powerful swell: Friday 18 Sep, 2AM (local time) - 6.5ft (2.0m), 9s period, ENE swell with 603 kJ wave energy.
Best Forecast Surf Conditions for Kailua Beach this week:
The most powerful waves expected at Kailua Beach in the next 16 days are 2.0m 9s and forecast to arrive on Friday (Sep 18) 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 0.5m 15s period and expected on Sunday (Sep 20) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Fri 18th Sep) | 6.5ft (2.0m) 9s |
Table - best surf conditions forecast for Kailua Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s take a hard look at what’s coming down the pipe at Kailua Beach (Oahu). Normally, this point break can be a gem, but this 16-day stretch is a tough one to call. The water temp is 81°, sitting about average for this time of year, so that's one small blessing.
Straight up, the first few days are a write-off for decent waves. The swell is tiny, the wind is mostly onshore or cross-onshore, and the wave comment keeps telling us conditions are poor. Sunday the 13th has a weak 3 ft NE swell (178 combined energy), but that onshore ENE wind just kills it. Monday the 14th and Tuesday the 15th are the same story – small, choppy, and messy. We’re looking at a real gap with no recommendations until maybe the end of the week.
Things finally start to show a pulse on Thursday the 17th. We get a 7 ft to 7 ft ENE swell pushing through. But here’s the kicker: that swell is short-period (7 seconds) and the wind is cranking onshore at 19 mph from the ENE. That combo is basically a washing machine. The combined energy climbs up to 486 (moderate) by Thursday afternoon, but it's just not surfable in any fun way. For experienced guys only, and even then, it’s a battle.
Friday the 18th through the weekend stays similar – 6 ft to 7 ft ENE/E swells. Periods hover around 8 seconds, which is still pretty average, and the wind doesn't ease up. It’s a 16-19 mph cross-onshore mess, churning up lumpy, choppy lines. These are not the clean, peeling walls you’re after at a point break. Honestly, if you had a kite, this might be more your scene than a paddle board.
As we push into the second week, there’s one day that catches the eye. Wednesday, 23rd September is the standout, and I mean the *only* standout. We’re looking at a 7-8 ft E swell with a longer period hitting 11 seconds. The combined energy gets strong, reaching 1317 by the afternoon. This is real groundswell energy. The problem is the wind is still a firm 16-19 mph from the ENE, keeping the cross-onshore chop in play. It’s going to be big, powerful, and raw – for experts only. If you can deal with the bump, there could be some heavy, fast sections. But it’s not the clean, glassy day you dream of.
After that, the swell drops off through the 24th and 25th. Then on Saturday the 26th, something strange pops up – a 2 ft NW swell with a very long 18-second period (439 combined energy). That’s a long-range pulse, but it’s tiny and weirdly directional for this break. It’ll be flat and wonky.
The final few days from the 27th slip back into the same onshore, choppy pattern with 5 ft to 6 ft ENE swell. Nothing to get excited about.
So, the honest truth: this is a grim window for Kailua Beach. The wind just won’t play ball. The one shot at some decent size and energy is around Wednesday the 23rd, but only if you’re an expert and don’t mind it blown-out and lumpy. For most of us, it’s a long wait for a clean day that just isn’t here. The forecasts can change, but right now, I’d leave the boards at home for a bit.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 26°C on Mon afternoon, min 25°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 13mm), heaviest on Thu night. Warm (max 27°C on Fri afternoon, min 25°C on Wed night). Mainly fresh winds. | |||||||||||||||||||
Sun 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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) | NE 9 | NE 9 | NE 8 | NE 8 | ENE 5 | NNE 8 | E 12 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 9 | ENE 8 | ENE 8 | E 7 | E 7 | E 8 | E 7 |
Wave Graph | ||||||||||||||||||||
112 | 123 | 82 | 196 | 51 | 39 | 44 | 62 | 97 | 131 | 191 | 389 | 482 | 603 | 461 | 383 | 358 | 329 | 383 | 355 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross-on | cross-on | on | on | on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 3:16PM0.65m | 4:32AM0.72m | 3:26PM0.60m | 5:15AM0.70m | 3:27PM0.55m | 6:09AM0.67m | 3:00PM0.53m | 7:35AM0.64m | 9:58AM0.64m | 11:15AM0.68m | ||||||||||
Low Tide | 9:43PM0.13m | 10:23AM0.39m | 10:04PM0.13m | 11:06AM0.45m | 10:26PM0.15m | 12:06PM0.50m | 10:52PM0.18m | 11:26PM0.21m | 00:33AM0.25m | 3:03AM0.26m | ||||||||||
— | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | 1 | — | — | — | — | — | 3 | 2 | — | 6 | 2 | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 26 | 26 | 26 |
Feels °C | 25 | 26 | 25 | 26 | 26 | 28 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 27 | 26 | 26 | 25 | 26 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 9 | NE 8 | SSW 22 | NE 8 | NNE 8 | NNE 8 | NNE 8 | E 10 | E 10 | E 10 | SSW 16 | SSW 19 | SSW 18 | SSW 17 | SW 17 | SSW 15 | SW 16 | S 18 | SSW 16 |
112 | 123 | 82 | 45 | 51 | 39 | 40 | 32 | 51 | 72 | 94 | 25 | 35 | 124 | 116 | 71 | 44 | 61 | 55 | 86 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SSW 14 | SW 14 | SW 14 | NNE 10 | E 12 | E 12 | E 11 | SW 18 | SW 18 | SW 17 | SSW 19 | SSW 16 | SE 10 | SE 10 | SSE 8 | SSW 16 | S 18 | SSW 16 | SE 8 |
8 | 20 | 8 | 8 | 9 | 26 | 44 | 37 | 80 | 79 | 76 | 37 | 24 | 4 | 4 | 6 | 26 | 25 | 24 | 3 | |
Swell 3 Height (m) Direction Period (s) | NW 13 | NW 12 | SE 8 | E 15 | E 13 | SW 20 | SSW 20 | SW 19 | N 10 | NNE 8 | S 11 | S 11 | SE 10 | NW 12 | NW 10 | S 21 | S 19 | S 6 | SSW 14 | S 13 |
7 | 6 | 2 | 4 | 14 | 60 | 37 | 95 | 7 | 14 | 2 | 2 | 4 | 6 | 4 | 9 | 29 | 1 | 19 | 3 | |
Wind waves Height (m) Direction Period (s) | ENE 9 | E 4 | ENE 5 | NE 8 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 9 | ENE 8 | ENE 8 | E 7 | E 7 | E 8 | E 7 |
59 | 7 | 27 | 196 | 51 | 39 | 44 | 62 | 97 | 131 | 191 | 389 | 482 | 603 | 461 | 383 | 358 | 329 | 383 | 355 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 17 | 17 | 41 | 17 | 17 | 40 | 18 | 17 | 41 | 122 | 41 | 43 | 43 | 41 | 46 | 46 | 41 | 41 | 41 | 41 |
Best forecast wave conditions in Oahu | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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Information about the Kailua Beach Surf forecast
The above surf forecast table for Kailua Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kailua Beach can be found by selecting the local surf guide option on the grey menu. Our Kailua Beach 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 (Kailua Beach) 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 Kailua Beach 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.
Kailua Beach is 0 km (0 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.










