Surf Forecast Surf Report

Ko Samui surfForecast / Gulf of Thailand / Thailand

information circle12 Day Weather and Surf, issued 6 am Friday 02 May 2025 +07
Forecast update in hr  min  s Forecast update imminent
Ko Samui surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Ko Samui sea temperature is
30.8° C
(Which is slightly warmer than usual)


Best Forecast Surf Conditions for Ko Samui this week:

The most powerful waves expected at Ko Samui in the next 12 days are 0.2m 5s and forecast to arrive on Friday (May 02) at 7PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Tuesday (May 06) at 10AM.

Wave TypeTime (+07) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 7PM (Fri 2nd May)0.5ft (0.2m) 5s

Table - best surf conditions forecast for Ko Samui over the next 12 days.

Updates in  hr  min  s Forecast update imminent
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.2
ESE
0.1
E
0.2
ESE
0.2
ESE
0.2
ESE
0.1
E
0.1
E
0.1
NW
0.1
E
0.2
S
0.1
S
0.2
SSE
0.1
S
0.1
SE
0.2
SSE
0.1
S
0.2
S
0.1
S
0.1
NW
0.1
S
0.2
WSW
0.1
SE
0.2
W
0.3
WSW
0.1
NW
0.1
N
0.2
WSW
0.3
WSW
0.4
W
0.5
W
0.2
NNW
0.2
NNW
0.5
NW
0.3
WSW
0.1
S
0.5
NW
Period(s) (?)455424534454365444452422442233665335
Wave
Graph
(?)Metric surfscale
Energy (?)212200000101023110000100000000000000
Wind
(km/h)
10
S
10
SE
10
S
15
SE
20
SSE
20
WSW
10
W
5
WNW
25
W
25
W
10
WNW
25
W
25
WSW
15
W
35
SW
30
W
30
WSW
25
WSW
25
WSW
15
WNW
25
WSW
20
W
20
WNW
25
W
25
WSW
30
WSW
40
WSW
35
WSW
30
WNW
30
WSW
35
WSW
35
WSW
30
W
35
WSW
35
WSW
40
WSW
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on
oncross-
on
cross-
on
cross-
on
cross-
off
cross-
off
glasscross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
offcross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
cross-
off
High Tide
/ height (m)
2:14AM
1.52
3:01AM
1.42
3:46AM
1.30
4:27AM
1.16
5:02AM
1.01
5:30AM
0.86
11:13PM
0.76
10:23PM
0.87
10:23PM
1.00
10:38PM
1.11
11:00PM
1.21
11:29PM
1.29
Low Tide
/ height (m)
12:26PM
-0.02
1:29PM
0.03
2:15PM
0.10
2:39PM
0.18
2:44PM
0.26
2:41PM
0.33
2:32PM
0.39
2:16PM
0.44
1:42PM
0.46
7:44AM
0.42
8:07AM
0.30
8:39AM
0.20
Friday
02
Saturday
03
Sunday
04
Monday
05
Tuesday
06
Wednesday
07
Thursday
08
Friday
09
Saturday
10
Sunday
11
Monday
12
Tuesday
13
Sunrise6:01--6:01--6:01--6:01--6:01--6:01--6:01--6:00--6:00--6:00--6:00--5:58--
Sunset-6:30--6:30--6:30--6:30--6:30--6:30--6:30--6:30--6:30--6:31--6:31--6:31-
thunderstorm part cloudrain showersmod rainthunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm thunderstorm part cloudclearpart cloudpart cloudpart cloudpart cloudthunderstorm thunderstorm thunderstorm thunderstorm part cloudpart cloudthunderstorm thunderstorm thunderstorm mod rainmod rainthunderstorm thunderstorm part cloud
Rain (mm)
1-361129114683111264------2516--4426634-
Temp. °C293030292828283028282928282829282929293130293130303129303028292928282829
Feels °C (?)323333313031313330293228293028282928303130313230313126302927282727262827

Short Range Forecast: Heavy rain (total 47mm), heaviest during Sat morning. Warm (max 30°C on Fri afternoon, min 27°C on Sun night). Wind will be generally light.

Days 3-6 Weather Summary Heavy rain (total 68mm), heaviest during Mon night. Warm (max 29°C on Mon afternoon, min 27°C on Mon morning). Winds increasing (light winds from the WNW on Mon afternoon, fresh winds from the SW by Tue night).

Days 6-9 Weather Summary Moderate rain (total 14mm), heaviest on Sat afternoon. Warm (max 31°C on Thu afternoon, min 28°C on Thu morning). Winds increasing (light winds from the WNW on Thu afternoon, strong winds from the WSW by Sat night).

Long Range Forecast: Heavy rain (total 29mm), heaviest during Sun afternoon. Warm (max 30°C on Sun morning, min 27°C on Tue afternoon). Mainly strong winds.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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Information about the Ko Samui Surf forecast

The above surf forecast table for Ko Samui provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Ko Samui can be found by selecting the local surf guide option on the grey menu. Our Ko Samui 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 (Ko Samui) 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 Ko Samui 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.

Ko Samui is 14 km (9 miles) from the city of Ko Samui. If you plan a holiday in Gulf of Thailand, look for hotels and other accommodation in Ko Samui. Ko Samui has rooms for a wide range of budgets as well as car hire and transport links.

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