Surf Forecasts:
In Betweens surf forecast from 11 Sep 2026:
- Best quality surf: Saturday 12 Sep, 5PM (local time) - 1.5ft (0.5m), 16s period, SW swell with cross-offshore winds.
- Most powerful swell: Friday 18 Sep, 2AM (local time) - 3.5ft (1.0m), 18s period, SSW swell with 644 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 5PM (local time) - 1.5ft (0.5m), 16s period with SW swell.
Best Forecast Surf Conditions for In Betweens this week:
The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Saturday (Sep 12) at 5PM. The primary swell is predicted to be 0.5m and 16s period with a secondary swell of 0.7m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 1.0m 18s and forecast to arrive on Friday (Sep 18) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 9s period and expected on Sunday (Sep 13) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Sat 12th Sep) | 1.5ft (0.5m) 16s |
| Best Surf | 5PM (Sat 12th Sep) | 1.5ft (0.5m) 16s |
| Most Powerful | 2AM (Fri 18th Sep) | 3.5ft (1.0m) 18s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s break down what’s cooking at In Betweens. This reef break is beginner-friendly, but the coming stretch is mostly flat and wind-slammed. Water’s about 81°F, normal for the season.
First chance to get wet is Friday the 11th of September. Morning brings a 2ft swell from the SW, rolling on a very long 16-second period—that’s groundswell, good for the reef. Combined energy is 488, so moderate push. But the cross-off wind is howling at 25 mph from the ENE, and the wave verdict is poor. Afternoon shows 4ft from the east at 11 seconds, energy 515, but those winds just mess it up. Marginal at best.
Saturday the 12th is a similar story: cross-off winds, 2ft SW at 15 seconds in the morning (energy 411), then dropping to 2ft SW in the afternoon (energy 222). The comment for the afternoon says “good surf conditions,” and with a 15 mph NE breeze, it’s the cleanest of the bunch so far, but the swell is tiny.
From Sunday the 13th through Friday the 18th of September, it’s almost a total wipeout. Periods of flatness or junk, with winds from 20–40 mph. On Thursday the 17th, a short-period 7ft ENE groundswell kicks in at 8 seconds, energy soaring into the 1000s—strong, but with 40 mph winds it’s more of a kite day.
After a long drought, the only real glimmer pops up on Thursday the 24th of September. That morning we get 7ft of ENE swell, period still short at 9 seconds, energy 901. But the big win is the wind: a gentle 15 mph from the south-southeast in the morning, shifting to 10 mph from the south in the afternoon. That’s light, glassy offshore flow. Wave comments still say marginal, so it’s not perfect, but it’s the best session by far. Over 1.5m (5ft), it’s going to be too much for beginners.
The rest of the window is either too small, too rough, or both. No true standout, but that Thursday the 24th is the one to circle for anyone with some experience.
Rusty
Short Range ForecastMostly dry. Warm (max 26°C on Fri morning, min 24°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 27°C on Tue afternoon, min 25°C on Mon morning). Winds increasing (light winds from the NE on Mon morning, strong winds from the ENE by Wed afternoon). | ||||||||||||||||||||
Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | |||||||||||||||
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) | SW 16 | E 11 | ENE 10 | SW 15 | SW 16 | ENE 9 | SW 15 | SSW 15 | SW 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | ENE 8 | ENE 9 | SSW 18 |
Wave Graph  | |||||||||||||||||||||
 kJ | 261 | 286 | 245 | 242 | 124 | 84 | 107 | 84 | 38 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 429 | 614 | 603 | 644 |
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 | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | 5:31AM0.57m | 5:11PM0.43m | 6:14AM0.58m | 5:40PM0.36m | 7:02AM0.58m | 6:07PM0.30m | 7:59AM0.57m | 6:32PM0.25m | 9:10AM0.56m | 7:25PM0.21m | ||||||||
Low Tide | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | 11:45AM0.17m | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | 2:03PM0.23m | 00:07AM0.11m | 4:06PM0.24m | 00:38AM0.13m | 7:14PM0.21m | 1:26AM0.16m | |||||||
 | |  | | | | | |  | | | |  | | | | | | | | | |
 | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 27 | 26 | 26 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 25 | 24 | 25 | 25 | 26 | 26 | 25 | 25 | 25 | 24 | 24 | 24 | 27 | 27 | 25 | 25 | 25 | 24 | 24 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 7 | E 11 | ENE 10 | ENE 10 | NE 9 | NNE 9 | NE 9 | NNE 9 | NE 9 | NE 8 | SW 22 | NNE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 |
| kJ | 99 | 286 | 245 | 169 | 81 | 99 | 115 | 99 | 77 | 74 | 227 | 44 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 |
Swell 2 Height (m) Direction Period (s) | ENE 11 | SW 15 | SW 15 | NE 8 | ENE 10 | ENE 9 | SW 15 | SSW 15 | SW 12 | SW 14 | SW 14 | SW 21 | NNE 8 | E 11 | NNE 8 | SW 12 | SW 11 | E 10 | SSW 20 | SSW 19 | SSE 10 |
| kJ | 128 | 229 | 226 | 74 | 98 | 84 | 107 | 84 | 38 | 49 | 49 | 224 | 21 | 41 | 50 | 35 | 31 | 94 | 149 | 210 | 9 |
Swell 3 Height (m) Direction Period (s) | SW 16 | NNE 8 | SSE 6 | SW 15 | SW 16 | SSW 13 | ENE 9 | ENE 9 | ENE 8 | SW 23 | SSW 11 | SSW 13 | SW 13 | SW 12 | E 11 | WSW 8 | WSW 10 | SW 11 | SSW 11 | SSE 10 | W 10 |
| kJ | 261 | 51 | 10 | 242 | 124 | 68 | 26 | 25 | 14 | 86 | 12 | 68 | 42 | 38 | 58 | 6 | 9 | 19 | 11 | 10 | 7 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | E 5 | ENE 4 | NE 5 | ENE 5 | NE 8 | ENE 5 | NE 8 | NE 8 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 8 | ENE 9 | ENE 9 |
| kJ | — | — | — | — | — | — | 24 | 11 | 25 | 17 | 129 | 38 | 84 | 108 | 42 | 183 | 265 | 340 | 614 | 603 | 534 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 1 | 1 | 1 | 0 | 1 | 30 | 1 | 6 | 2 | 1 | 1 | 1 | 30 | 30 | 38 | 41 | 31 | 38 | 39 | 38 |
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.
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