Surf Forecasts:
In Betweens surf forecast from 13 Sep 2026:
- Best quality surf: Monday 14 Sep, 2AM (local time) - 1.5ft (0.4m), 12s period, SW swell with cross-offshore winds.
- Most powerful swell: Thursday 17 Sep, 8PM (local time) - 7ft (2.1m), 10s period, ENE swell with 788 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 2AM (local time) - 1.5ft (0.4m), 12s 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 Monday (Sep 14) at 2AM. The primary swell is predicted to be 0.4m and 12s period. 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 2.1m 10s and forecast to arrive on Thursday (Sep 17) at 8PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Sep 16) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 14th Sep) | 1.5ft (0.4m) 12s |
| Best Surf | 2AM (Mon 14th Sep) | 1.5ft (0.4m) 12s |
| Most Powerful | 8PM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright, here’s the outlook for In Betweens, same story, just in feet and mph.
Water temp is about 81°F, normal for this time of year.
Sunday the 13th of September starts off tiny: about 2 ft of SSW swell with a long 15-second period. Combined energy is weak at 206. The wind is a cross-off from the ENE at 12 mph, so it’s clean, just no size. Monday the 14th is even smaller, 1.0 ft to 2 ft. Still cross-off, still clean, still slow.
Tuesday the 15th and Wednesday the 16th see a little bump: 2 ft to 3 ft, energy gets into the moderate range (438–827). The wind is still cross-off, and the swell hangs in the S/SW with a long period (19 to 18 seconds). Clean, small, manageable. Beginners might like this.
Then Thursday the 17th pops up to 7 ft of messy E/ENE swell with a short 7–10 second period. Energy jumps to 808–1228. It’s strong but sloppy. That’s not going to hold up well on this reef. With the wind cross-off, it’ll be clean, but the shape will be junk. This is looking more like a kite session.
Friday the 18th drops back to 3 ft of SSW swell at 17 seconds. Energy still strong at 1128. Clean and cross-off, but nothing special.
From Saturday the 19th through the 25th of September, it’s a long stretch of E/ENE swells at 5 ft to 8 ft, with 8 to 11 second periods. Wind is 15 to 25 mph, cross-off but gusty. Waves over 5 ft start getting big for beginners, and by the 23rd and 24th, with 7 ft to 8 ft, that’s expert only. The short periods won’t give you great shape. Crowds are possible.
The last few days, the 26th to 28th of September, drop back to 2 ft to 3 ft of S/SW swell at 13–18 seconds. Energy is weak to moderate (154–507). Wind is still 22 mph cross-off or cross-shore. Clean but flat.
The best chance here? Wednesday the 23rd of September morning gives you 7 ft of E swell at 11 seconds, with strong energy (1707)—but that’s big and short-period, for experts only, with fresh cross-off wind keeping it clean. The other pick is Tuesday and Wednesday the 15th and 16th: small but clean, with decent period for the size—a good time for learners.
All in all, the 16-day window is pretty lackluster. No real standouts.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Tue afternoon, min 24°C on Sun night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 7mm), mostly falling on Thu night. Warm (max 27°C on Wed morning, min 26°C on Wed morning). Mainly fresh winds. | ||||||||||||||||||||
Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | |||||||||||||||
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 15 | SSW 15 | SW 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SSW 17 | ENE 7 | ENE 10 | ENE 9 | SSW 17 | SSW 17 | SSW 16 | ENE 8 | ENE 8 | E 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 107 | 84 | 38 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 377 | 383 | 756 | 677 | 622 | 580 | 539 | 473 | 449 | 566 |
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 | 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 | 10:27AM0.57m | 11:01PM0.21m | 11:34AM0.59m | 00:19AM0.23m | ||||||||
Low Tide | 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 | 7:23PM0.18m | 2:56AM0.18m | 7:43PM0.16m | 4:35AM0.17m | |||||||
 | |  | | |  |  | | | | | | | |  |  | | | | | | |
 | 6:16 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — |
 | — | 6:36 | — | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 4 | 3 | — | — | — | — | — |
Temp °C | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 |
Feels °C | 25 | 25 | 26 | 24 | 25 | 26 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 26 | 25 | 26 | 24 | 25 | 26 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | NNE 9 | NNE 9 | NE 9 | NE 8 | SW 22 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SSW 17 | SW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
| kJ | 99 | 99 | 79 | 74 | 227 | 31 | 392 | 384 | 470 | 455 | 541 | 377 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 350 |
Swell 2 Height (m) Direction Period (s) | SW 15 | SSW 15 | SW 12 | SW 14 | SW 14 | SW 21 | NNE 8 | NNE 8 | NNE 8 | SW 12 | E 10 | E 10 | SSW 20 | SSW 19 | W 10 | SSE 10 | SSE 8 | SSE 7 | SSW 18 | S 18 | SW 16 |
| kJ | 107 | 84 | 38 | 49 | 49 | 224 | 25 | 34 | 32 | 35 | 72 | 96 | 149 | 210 | 7 | 9 | 13 | 18 | 108 | 99 | 122 |
Swell 3 Height (m) Direction Period (s) | SW 12 | SW 12 | ENE 8 | SW 23 | SSW 11 | SSW 13 | E 12 | E 12 | E 11 | S 9 | SW 11 | SSW 11 | SW 11 | SW 10 | SSE 10 | W 9 | W 9 | S 20 | SSE 6 | SSE 6 | SSW 14 |
| kJ | 37 | 37 | 14 | 86 | 12 | 68 | 46 | 68 | 58 | 6 | 43 | 12 | 18 | 4 | 9 | 2 | 7 | 67 | 13 | 7 | 37 |
Wind waves Height (m) Direction Period (s) | ENE 9 | ENE 9 | ENE 4 | E 4 | NE 8 | ENE 5 | ENE 5 | ENE 5 | ENE 5 | ENE 10 | ENE 6 | ENE 6 | ENE 7 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 8 |
| kJ | 62 | 59 | 13 | 13 | 149 | 56 | 31 | 32 | 55 | 331 | 119 | 213 | 383 | 756 | 677 | 497 | 437 | 473 | 473 | 449 | 566 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 30 | 1 | 0 | 30 | 1 | 1 | 1 | 1 | 2 | 30 | 126 | 30 | 126 | 126 | 31 | 30 | 38 | 30 | 33 | 30 | 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.
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