Surf Forecasts:
Nai Harn Beach surf forecast from 23 Sep 2026:
- Most powerful swell: Sunday 27 Sep, 7AM (local time) - 4.5ft (1.3m), 6s period, W swell with 118 kJ wave energy.
Best Forecast Surf Conditions for Nai Harn Beach this week:
The most powerful waves expected at Nai Harn Beach in the next 16 days are 1.3m 6s and forecast to arrive on Sunday (Sep 27) at 7AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.3m 6s period and expected on Sunday (Sep 27) at 10AM.
| Wave Type | Time (+07) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 7AM (Sun 27th Sep) | 4.5ft (1.3m) 6s |
Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.
Short Range ForecastHeavy rain (total 45mm), heaviest during Wed morning. Warm (max 27°C on Wed morning, min 24°C on Thu afternoon). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 38mm), heaviest during Sun afternoon. Warm (max 28°C on Sun night, min 27°C on Sat morning). Winds decreasing (fresh winds from the WNW on Sat afternoon, calm by Mon night). | ||||||||||||||||||||
Wednesday 23 | Thursday 24 | Friday 25 | Saturday 26 | Sunday 27 | Monday 28 | Tuesday 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) | W 18 | W 18 | W 16 | W 16 | W 16 | W 16 | W 15 | W 15 | W 15 | W 15 | W 16 | W 6 | WSW 20 | WSW 19 | W 8 | WSW 18 | WSW 17 | WSW 16 | WSW 16 | WSW 16 | WSW 15 |
Wave Graph  | |||||||||||||||||||||
 kJ | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 5 | 6 | 50 | 38 | 37 | 72 | 30 | 29 | 26 | 25 | 24 | 21 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-off | on | on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | cross-on | on | cross-on | glassy | cross-on | cross |
High Tide | 9:07PM1.48m | 9:07AM1.71m | 9:35PM1.66m | 9:38AM1.83m | 10:03PM1.82m | 10:08AM1.92m | 10:31PM1.95m | 10:39AM1.96m | 11:01PM2.04m | 11:11AM1.95m | 11:32PM2.07m | 11:44AM1.88m | 00:05AM2.04m | ||||||||
Low Tide | 3:00PM0.38m | 2:59AM0.45m | 3:26PM0.22m | 3:32AM0.30m | 3:53PM0.09m | 4:04AM0.17m | 4:20PM-0.01m | 4:36AM0.07m | 4:49PM-0.06m | 5:09AM0.02m | 5:18PM-0.06m | 5:43AM0.02m | 5:49PM-0.00m | ||||||||
 |  |  |  | |  | | |  | | | | | | | | |  |  | |  | |
 | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — |
 | — | 6:22 | — | — | 6:22 | — | — | 6:21 | — | — | 6:21 | — | — | 6:20 | — | — | 6:19 | — | — | 6:19 | — |
mm | 9 | 3 | 1 | 4 | 7 | 7 | 5 | 4 | 5 | 6 | 2 | 6 | 5 | 6 | 6 | 3 | 2 | 2 | — | 2 | — |
Temp °C | 27 | 25 | 26 | 26 | 25 | 27 | 27 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
Feels °C | 28 | 26 | 29 | 28 | 28 | 29 | 29 | 28 | 27 | 28 | 27 | 27 | 28 | 28 | 30 | 30 | 30 | 31 | 32 | 31 | 32 |
Swell 1 Height (m) Direction Period (s) | W 13 | W 18 | W 8 | W 8 | W 8 | W 8 | W 8 | W 8 | W 9 | W 8 | W 8 | W 10 | WNW 9 | WSW 19 | W 7 | W 8 | W 8 | WNW 8 | WNW 8 | W 8 | W 7 |
| kJ | 4 | 6 | 72 | 55 | 55 | 58 | 44 | 46 | 57 | 52 | 33 | 67 | 28 | 37 | 131 | 145 | 131 | 77 | 75 | 55 | 35 |
Swell 2 Height (m) Direction Period (s) | W 18 | W 13 | W 16 | W 16 | W 16 | W 16 | W 15 | W 15 | W 15 | W 15 | WNW 10 | W 16 | WSW 20 | W 15 | WNW 10 | WSW 18 | WSW 17 | WSW 16 | SSE 4 | SSE 4 | SSE 5 |
| kJ | 6 | 3 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 5 | 19 | 5 | 38 | 4 | 18 | 30 | 29 | 26 | 2 | 2 | 4 |
Swell 3 Height (m) Direction Period (s) | — | — | W 13 | — | — | — | — | — | — | — | W 16 | W 22 | W 15 | — | WSW 18 | W 14 | — | — | WSW 16 | WSW 16 | WSW 15 |
| kJ | — | — | 3 | — | — | — | — | — | — | — | 5 | 9 | 4 | — | 32 | 4 | — | — | 25 | 24 | 21 |
Wind waves Height (m) Direction Period (s) | WNW 8 | WNW 8 | NNW 2 | — | — | WNW 8 | — | — | — | — | W 3 | W 6 | W 6 | W 7 | W 8 | — | — | — | — | S 4 | — |
| kJ | 77 | 96 | 1 | — | — | 20 | — | — | — | — | 6 | 50 | 130 | 157 | 72 | — | — | — | — | 1 | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 635 | 24 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 635 | 4 | 4 | 4 | 24 | 24 | 4 | 4 | 4 | 8 | 4 |
Best forecast wave conditions in Phuket | |||||||||||||||||||||
Best forecast wave conditions in Thailand | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Nai Harn Beach surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
Information about the Nai Harn Beach Surf forecast
The above surf forecast table for Nai Harn Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Nai Harn Beach can be found by selecting the local surf guide option on the grey menu. Our Nai Harn 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 (Nai Harn 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 Nai Harn 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.
Nai Harn Beach is 8 km (5 miles) from the city of Ban Chalong. If you plan a holiday in Phuket, look for hotels and other accommodation in Ban Chalong. Ban Chalong has rooms for a wide range of budgets as well as car hire and transport links.
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