Portstewart Water Temperature

Portstewart is a town close to Sea of the Hebrides. temperate oceanic climate with warm summer would be the climate here. September is the month with the highest water temperature at 57.4°F / 14.1°C. The month with the lowest is March with an average water temperature of 45.3°F / 7.4°C. The avg. air temperature is around 57°F / 13.9°C, July is the month with the highest temperature. January is the coolest with 40.1°F / 4.5°C average air temperature. May is the month with the min. precipitation of 2in / 50.9mm and November with the max. precipitation in a year with 4.9in / 125.1mm. If you plan to visit this place, the month June, July, August, September would be the best time.

Portstewart Summary

Description Value
Current water temperature /
Warmest Month Water Temperature: September with 14.1°C / 57.4°F
Coldest Month Water Temperature: March with 7.4°C / 45.3°F
Warmest Month Air Temperature: July with 13.9°C / 57°F
Coldest Month Air Temperature: January with 4.5°C / 40.1°F
Wettest Month: November with 125.1mm / 4.9in
Driest Month: May with 50.9mm / 2in
Highest Humidity December with 85.9%
Lowest Humidity May with 78.3%
Best Time to Visit: June, July, August, September
Climate Classification temperate oceanic climate with warm summer

Portstewart water temperature by month

Sea of the Hebrides water temperature by month

Max. Water

Temperature (°C)

ø. Water

Temperature (°C)

Min. Water

Temperature (°C)

January

9.1 8.5 8

February

8 7.7 7.4

March

7.6 7.4 7.3

April

8.7 8 7.5

May

10.3 9.4 8.7

June

12.1 11.2 10.3

July

13.7 12.9 12.1

August

14.4 14 13.7

September

14.3 14.1 13.7

October

13.7 13.2 12.5

November

12.5 11.6 10.8

December

10.8 10 9.2

Sea of the Hebrides water temperature by month

Max. Water

Temperature (°F)

ø. Water

Temperature (°F)

Min. Water

Temperature (°F)

January

48.4 47.3 46.4

February

46.4 45.9 45.3

March

45.7 45.3 45.1

April

47.7 46.4 45.5

May

50.5 48.9 47.7

June

53.8 52.2 50.5

July

56.7 55.2 53.8

August

57.9 57.2 56.7

September

57.7 57.4 56.7

October

56.7 55.8 54.5

November

54.5 52.9 51.4

December

51.4 50 48.6
The hottest water temperature typically reached in September with around 57.4°F / 14.1°C. The coldest in March with an average water temperature of 45.3°F / 7.4°C.

Portstewart weather by month / climate table

Max.

Temperature

°C

ø.

Temperature

°C

Min.

Temperature

(°C)

Precip.

(mm)

Rainy Days

(d)

Rel. Humidity

(%)

January

7.3 4.5 1.8 119.3 17 85.4%

February

7.4 4.6 1.7 78.9 10 82.6%

March

9.1 5.5 1.2 54.3 9 80.3%

April

12.2 7.4 3.4 54.4 8 78.6%

May

13.9 9.9 5 50.9 11 78.3%

June

16.5 12.3 8.6 83.9 15 79.9%

July

17.7 13.9 10.4 99.7 18 81.4%

August

17.3 13.8 10.6 117.1 20 82.5%

September

16.5 12.5 9.4 91.7 14 81.9%

October

13.1 9.8 6.5 108.2 0 83%

November

10.2 7 3.7 125.1 18 84.8%

December

7.9 5 2 107.5 15 85.9%

Max.

Temperature

°F

ø.

Temperature

°F

Min.

Temperature

(°F)

Precip.

(in)

Rainy Days

(d)

Rel. Humidity

(%)

January

45.1 40.1 35.2 4.7 17 85.4%

February

45.3 40.3 35.1 3.1 10 82.6%

March

48.4 41.9 34.2 2.1 9 80.3%

April

54 45.3 38.1 2.1 8 78.6%

May

57 49.8 41 2 11 78.3%

June

61.7 54.1 47.5 3.3 15 79.9%

July

63.9 57 50.7 3.9 18 81.4%

August

63.1 56.8 51.1 4.6 20 82.5%

September

61.7 54.5 48.9 3.6 14 81.9%

October

55.6 49.6 43.7 4.3 0 83%

November

50.4 44.6 38.7 4.9 18 84.8%

December

46.2 41 35.6 4.2 15 85.9%
The warmest avg. temperature is around 57°F / 13.9°C, July is the month with the highest temperature. January is the coolest with 40.1°F / 4.5°C average air temperature. May is the month with the min. precipitation of 2in / 50.9mm and November with the max. precipitation in a year with 4.9in / 125.1mm.

Activities & POI in Portstewart

Type of Activity List
Beach Portstewart Strand
Golf Course Riverside - Portstewart Golf Club, The Strand - Portstewart Golf Club, The Old Course
Caravan Site Juniper Hill Caravan Park
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