Nai Harn Beach Surf Break

Lat Long: 7.78° N 98.30° E

Nai Harn Beach Surf Forecast and Surf Report

Issued: 6 pm 01 Aug 2026 (local time)

Forecast update in  hr  min

Today's Nai Harn Beach sea temperature is
30.1° C
0.9° 

Nai Harn Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Nai Harn Beach surf forecast from 1 Aug 2026:

  • Most powerful swell: Sunday 9 Aug, 1AM (local time) - 8ft (2.5m), 9s period, W swell with 1,270 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 2.5m 9s and forecast to arrive on Sunday (Aug 09) at 1AM. 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 8s period and expected on Sunday (Aug 02) at 1AM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 1AM (Sun 9th Aug)8ft (2.5m) 9s

Table - best surf conditions forecast for Nai Harn Beach over the next 16 days.


The Lowdown

Alright, Rusty here. Let’s talk about what’s on offer for the next couple of weeks down at Nai Harn Beach.

To be straight with you, this stretch of sand and reef is looking pretty grim for the whole 16-day run. There’s a big gap right from the start with no real surf on offer. The first week, from August 1st through to around August 7th, it’s all poor conditions – wind is mostly onshore or cross-onshore, and the wave quality is junk. We get some size building by the 4th, with swell around 3ft to 6ft from the W and WSW, but the wind turns fresh to strong, and the combined energy kicks up into the moderate range (202 to 446), yet it’s messy and stormy. By the 5th and 6th, we’re looking at 8ft to 8ft of W-SW swell with onshore wind howling at 22-28 mph, and the energy climbs into the strong bracket (973 to 1081). That’s big, raw, and blown-out – not for paddling. A beach-and-reef setup like Nai Harn with that much wind and size would be more interesting for kite surfing than paddle surfing.

The gap of no good surf runs through the entire first week and into the second. We finally see a flicker of life on the morning of August 14th, where a 7ft W swell with 9-second period and light SSW wind at 6 mph gives us a “marginal” call (combined energy 724 – moderate). But it’s still an onshore wind state, so don’t get your hopes up. After that, the rest of the run from the 15th onward is back to cross-onshore wind and choppy, lumpy conditions.

Water temp is sitting at 86°F with a 2° anomaly, so about average for the time of year – nothing to write home about.

Honestly, there’s no standout here. No break to highlight as the best on offer. If you’re desperate, that Friday morning on the 14th might be the least terrible, but it’s still onshore. Otherwise, keep the board in the car and wait for a change in the pattern.

Rusty.

Short Range Forecast

Moderate rain (total 14mm), heaviest on Mon night. Warm (max 29°C on Sat afternoon, min 28°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Heavy rain (total 86mm), heaviest during Wed morning. Warm (max 28°C on Tue afternoon, min 27°C on Thu afternoon). Winds increasing (light winds from the WSW on Tue afternoon, strong winds from the WSW by Thu afternoon).

Sat
1
Sunday
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.2
WSW
16
0.3
WSW
16
0.5
W
8
0.5
W
8
0.4
W
8
0.2
WSW
15
0.6
W
10
0.8
W
7
1
W
10
1.7
WSW
9
2.5
WSW
8
2.5
WSW
9
2.3
WSW
10
2
W
10
2.5
W
8
2.5
WSW
9
2.5
W
9
2.5
W
9
2.2
W
9
2.4
W
9
Wave Graph
Metric surfscale
Energy kJ
25
51
29
31
24
23
65
69
196
446
708
972
920
739
899
1081
963
985
775
958
Wind (km/h)
10
S
5
SSW
5
WSW
15
SW
15
WSW
5
SSW
5
SSE
10
SSW
10
WSW
20
WSW
35
WSW
35
WSW
30
SW
35
WSW
40
SW
45
WSW
45
WSW
45
WSW
45
WSW
50
WSW
Wind State
cross-on
on
on
on
on
cross-on
cross-on
on
cross-on
cross-on
cross-on
on
on
on
on
on
cross-on
on
on
cross-on
High Tide
00:29AM1.73m
12:32PM1.91m
1:01AM1.75m
1:04PM1.83m
1:37AM1.74m
1:39PM1.71m
2:16AM1.69m
2:20PM1.57m
3:05AM1.62m
3:12PM1.40m
4:10AM1.54m
4:30PM1.24m
Low Tide
6:23PM0.07m
6:24AM0.23m
6:52PM0.07m
6:59AM0.27m
7:22PM0.11m
7:37AM0.34m
7:56PM0.19m
8:22AM0.44m
8:36PM0.30m
9:18AM0.55m
9:27PM0.44m
10:40AM0.65m
10:43PM0.57m
clear
rain showers
clear
thunderstorm
rain showers
clear
clear
rain showers
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
thunderstorm
mod rain
mod rain
thunderstorm
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:18
6:18
6:18
6:18
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:45
6:45
6:45
6:45
6:45
6:45
6:45
 mm
2
1
5
5
1
2
13
13
12
13
5
2
16
10
8
12
Temp °C
29
29
29
29
29
29
29
29
28
28
28
28
28
28
28
27
28
28
28
28
Feels °C
32
33
33
31
32
33
33
32
30
29
27
27
28
26
26
23
26
25
25
24
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder
How to use the Wavefinder 
submit an eyeball surf report

Quick surf report for Nai Harn Beach:

join our community of surf reporters

FREE! Surf-Forecast.com widget for your website

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.

Nearest locationNearest