World Resorts Vietnam Hoi An Weather

Hoi An sea water temperature

Current sea water temperature:
+78.4°F
Minimum sea water temperature in April: 82.6°F
Maximum sea water temperature in April: 72.7°F
Average sea water temperature in April: 77.6°F

Sea water temperature for the last 10 days:

April 25 78.4°F April 20 78.8°F
April 24 78.3°F April 19 78.6°F
April 23 78.1°F April 18 79.2°F
April 22 77.9°F April 17 79.3°F
April 21 78.3°F April 16 80.4°F

When is the warmest sea in Hoi An?

Based on the data about daily sea water temperature for the last three years the warmest sea in Hoi An was noticed in August, September and July.

Monthly Sea Temperatures in Hoi An, °F

Sea water temperature in August, °F

Show year:
2025
2024
2023

The average sea water temperature in August of 2025 was 85.4°F. The highest and lowest sea temperatures during the month were 86.0°F and 84.6°F.

Sea water temperature in September, °F

Show year:
2025
2024
2023

The average sea water temperature in September of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 86.4°F and 84.0°F.

Sea water temperature in July, °F

Show year:
2025
2024
2023

The average sea water temperature in July of 2025 was 85.0°F. The highest and lowest sea temperatures during the month were 86.4°F and 83.1°F.

Best time for vacation in Hoi An

Sunniest months:
April 17 days
May 16 days
June 16 days
Warmest months:
June 90.9 °F
August 90.3 °F
July 89.8 °F
Warmest sea temp:
August 85.5 °F
September 85.4 °F
July 84.5 °F
Coldest months:
January 73.9 °F
December 74.7 °F
February 76.1 °F
Rainiest months:
December 15 days
November 14 days
October 13 days
Windiest months:
December 7.8 mph
November 7.3 mph
April 7.2 mph

Hoi An on a weather map

Hoi An
+73°F
E 2 mph
Feels like: +77°F
Precip.: 0%
Places in Vietnam:
Name
°F
+73°F
+77°F
+61°F
+73°F
+73°F
+73°F
+75°F
+75°F
+73°F
+73°F
+75°F
+82°F
+73°F
+72°F
+81°F
24 Hours Forecast
Hoi An
Local time: 03:32
April 26, sunday
0600
73°F
NE
4 mph
0900
82°F
NW
5 mph
1200
82°F
W
11 mph
1500
82°F
W
11 mph
1800
77°F
W
6 mph
2100
75°F
NW
4 mph
April 27, monday
0000
73°F
N
5 mph
0300
72°F
N
4 mph

Best place for vacation:

Units of measurement: °C / °F