Surf Forecasts:
In Betweens surf forecast from 23 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for In Betweens this week:
The most powerful waves expected at In Betweens in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 7s period and expected on Friday (Aug 28) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s get stuck into what’s shaping up for In Betweens over the next couple of weeks.
Right off the bat, we’re looking at a pretty grim stretch for the first week or so. For the next few days, the wind is hammering in from the ENE at 22 to 25 mph, and while it’s technically cross-off, the swell is a short, weak 5 ft to 6 ft with a period of only 7 seconds. The combined energy is in the moderate range (533 to 649), but the wave quality is just poor. There’s really nothing to get excited about here. The water temperature is sitting at 81°, which is pretty much normal for this time of year, so no surprises there.
Late on Wednesday the 26th, we start to see a change. The swell direction swings around to the south, and the period jumps to 18 seconds – that’s proper groundswell. The height drops to 2 ft, but the energy bumps up (681) and the conditions are clean. The wind is still a fresh cross-off from the ENE, so not ideal, but it’s a move in the right direction. This marginal window continues through Thursday the 27th with a 4 ft south swell at 17 seconds (energy 855), and into Friday the 28th, but the energy starts to fade (409-592). The wind never lets up enough to make it a standout.
We hit a bit of a lull over the weekend of the 29th and 30th, with the swell dropping back to short-period ENE junk at 5 ft and energy around 500-600. The wind is still fresh, and the surf is marginal at best. By Monday the 31st, the swell is tiny – 2 ft – and the end of the first week looks like a write-off.
Now, the second week opens up with something that has my attention. On Tuesday, September 1st, the swell jumps to 7 ft from the ENE with a period of 9 seconds, and the combined energy rockets up to 1274-1280 – that’s strong. The wind is still a moderate cross-off in the morning, but by afternoon it shifts to a gentle cross-onshore, which will mess with the face. The quality is still marked as marginal, but the size is there. It’s not the best, but it’s a pulse.
The real standout, and I mean the one you circle on the calendar, comes on Monday, September 7th. The morning sees a 8 ft ENE swell at 12 seconds, with energy at a massive 2630. The wind is a near-calm 3 mph from the northeast, keeping it cross-off and clean. Then the afternoon? Absolute magic. The wind goes glassy, swinging to the NNW at 3 mph, and the swell pushes up to 10 ft with the same 12-second period. The energy is a staggering 2913. This is excellent surf, but it’s only for experienced surfers – at 8 ft to 10 ft, it’s too big for beginners. The long period (12-13 seconds) will see the waves breaking a bit more straight at the beach, but with the glassy conditions and the strong energy, it’s going to be a serious session for those who know what they’re doing. Crowds are listed as “sometimes,” so you might have some company, but with the quality on offer, it’ll be worth it.
Everything else in the second week is a supporting act. The 3rd to the 6th of September has consistent 7 ft to 8 ft ENE swell (8-14 second period) with energy in the 1000-2300 range, but the wind is always a fresh cross-off, keeping it clean but not as pristine as that Monday. The 2nd of September is a drop back to a 3 ft south groundswell, which is a bit of a tease.
So, to sum it up: the first week is a write-off with no real recommendations. The second week builds nicely, but the one true standout is Monday, September 7th – that’s the day to be out at In Betweens, when the glassy conditions and the solid 10 ft groundswell line up. Keep an eye on that forecast, because it could be a cracker.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 24°C on Tue night). Mainly strong winds. | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 25°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | Saturday 29 | |||||||||||||||
AM | 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 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||||
295 | 349 | 307 | 277 | 247 | 254 | 457 | 346 | 277 | 239 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 299 | 219 | 192 | 214 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 1:52PM0.66m | 1:46AM0.26m | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | 3:24PM0.68m | 3:31AM0.37m | 3:53PM0.66m | 4:08AM0.41m | 4:20PM0.62m | 4:47AM0.46m | 4:49PM0.57m | ||||||||
Low Tide | 9:18PM0.14m | 6:59AM0.08m | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | 8:24AM0.05m | 10:12PM0.10m | 9:05AM0.06m | 10:32PM0.08m | 9:46AM0.07m | 10:54PM0.07m | 10:31AM0.10m | 11:17PM0.05m | ||||||||
6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | |
— | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:51 | — | — | 6:50 | — | |
mm | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 25 | 25 | 24 | 25 | 26 | 26 | 23 | 23 | 23 | 23 | 24 | 22 | 23 | 24 | 23 | 24 | 23 | 23 | 23 | 23 | 21 |
Swell 1 Height (m) Direction Period (s) | SW 15 | SSW 15 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 12 | SSW 16 | SSW 15 | SSW 14 | S 18 | S 19 | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 12 | E 14 | E 13 |
116 | 191 | 100 | 166 | 156 | 127 | 85 | 142 | 121 | 215 | 307 | 351 | 716 | 427 | 482 | 260 | 329 | 225 | 110 | 96 | 173 | |
Swell 2 Height (m) Direction Period (s) | S 13 | SSE 11 | SSE 13 | SSE 12 | SSE 8 | SSE 7 | SSW 16 | SSW 12 | SSW 12 | S 18 | SSW 13 | SSW 13 | N 8 | SSW 12 | NNE 7 | SSW 11 | E 14 | E 13 | S 13 | S 12 | S 12 |
90 | 25 | 56 | 50 | 24 | 15 | 146 | 81 | 81 | 165 | 135 | 137 | 6 | 47 | 11 | 22 | 33 | 78 | 85 | 76 | 102 | |
Swell 3 Height (m) Direction Period (s) | SSW 15 | WNW 10 | SSW 15 | SSE 8 | SSE 12 | SSW 17 | SSE 12 | SSE 10 | SSW 18 | SSE 12 | SSE 6 | SSW 16 | WNW 10 | NNE 8 | W 11 | NNE 7 | SSW 19 | SW 19 | S 13 | S 13 | SSW 17 |
76 | 19 | 71 | 13 | 47 | 94 | 29 | 22 | 109 | 27 | 7 | 50 | 9 | 13 | 9 | 9 | 36 | 56 | 89 | 89 | 188 | |
Wind waves Height (m) Direction Period (s) | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | ENE 7 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 |
295 | 349 | 307 | 277 | 247 | 254 | 457 | 346 | 277 | 239 | 177 | 188 | 160 | 165 | 160 | 135 | 216 | 299 | 219 | 192 | 214 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 38 | 46 | 38 | 38 | 30 | 31 | 38 | 38 | 31 | 38 | 33 | 30 | 30 | 44 | 1 | 30 | 44 | 30 | 31 | 38 | 30 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the In Betweens Surf forecast
The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.
In Betweens is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.











