Swimming on the island of Sumatra in july 2025 Sea temperature by city in july

Do you want to go to the beach on the island of Sumatra in july 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in july on the island of Sumatra by city and our opinion on the chances of enjoying pleasant sea conditions.

Sea temperature on the island of Sumatra in july 2025

Here, find the average sea temperature on the island of Sumatra in july in several coastal cities.

Direct access: North in july | South in july | Central in july | Riau Islands in july | Bangka-Belitung Islands in july

North in july

Banda Aceh

on average:

85°F

min: 84°F / max: 86°F

Gunungsitoli (Pulau Nias)

on average:

86°F

min: 84°F / max: 89°F

Calang

on average:

86°F

min: 85°F / max: 88°F

Langsa

on average:

86°F

min: 85°F / max: 89°F

Lhokseumawe

on average:

86°F

min: 84°F / max: 88°F

Sibolga

on average:

86°F

min: 84°F / max: 89°F

South in july

Bandar Lampung

on average:

85°F

min: 83°F / max: 86°F

Bengkulu

on average:

85°F

min: 84°F / max: 87°F

Way Kambas National Park

on average:

85°F

min: 83°F / max: 86°F

Way Kambas National Park

on average:

85°F

min: 83°F / max: 86°F

Central in july

Dumai

on average:

86°F

min: 85°F / max: 88°F

Padang City

on average:

86°F

min: 85°F / max: 88°F

Pulau Rupat

on average:

86°F

min: 85°F / max: 88°F

Pulau Siberut

on average:

86°F

min: 84°F / max: 88°F

Pariaman

on average:

86°F

min: 85°F / max: 88°F

Riau Islands in july

Batam

on average:

86°F

min: 85°F / max: 87°F

Tanjungpinang

on average:

85°F

min: 84°F / max: 87°F

Bangka-Belitung Islands in july

Pulau Belitung

on average:

85°F

min: 83°F / max: 87°F

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Sea temperature in june on the island of Sumatra

Sea temperature in august on the island of Sumatra

Where should you go swimming on the island of Sumatra in the month of july?

Swimming on the island of Sumatra in july is ideal

In july on the island of Sumatra swimming conditions are generally the same everywhere.

In july in Banda Aceh, Bandar Lampung, Bengkulu, Dumai, Gunungsitoli (Pulau Nias), Padang City, Batam, Way Kambas National Park, Calang, Pulau Belitung, Pulau Rupat, Pulau Siberut, Way Kambas National Park, Langsa, Lhokseumawe, Pariaman, Sibolga, Sigli and Tanjungpinang, swimming conditions are perfect! With water reaching a maximum of 86°F and an average of 85°F, going in the water (and staying there!) feels great.

Where to go swimming on the island of Sumatra in july: the map of sea temperatures

ideal swimming

pleasant swimming

cool swimming

cold swimming

freezing swimming

Water temperature and seasonal norms in july

Banda Aceh

	June	July	August
Average sea temperature	86°F	85°F	85°F
Minimum sea temperature	84°F	84°F	84°F
Maximum sea temperature	87°F	86°F	86°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	90°F	90°F	90°F
Minimum outside temperature	79°F	77°F	77°F
Precipitation	3.9in	4in	5in
Number of days of precipitation	6 jour(s) (19%)	5 jour(s) (16%)	6 jour(s) (20%)
Cloud cover	30%	33%	35%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Banda Aceh in july

Bandar Lampung

	June	July	August
Average sea temperature	85°F	85°F	84°F
Minimum sea temperature	84°F	83°F	82°F
Maximum sea temperature	87°F	86°F	86°F
Average outside temperature	83°F	83°F	83°F
Maximum outside temperature	90°F	88°F	90°F
Minimum outside temperature	77°F	77°F	77°F
Precipitation	7.4in	5in	4.5in
Number of days of precipitation	14 jour(s) (47%)	9 jour(s) (29%)	9 jour(s) (28%)
Cloud cover	41%	40%	39%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Bandar Lampung in july

Bengkulu

	June	July	August
Average sea temperature	86°F	85°F	84°F
Minimum sea temperature	85°F	84°F	82°F
Maximum sea temperature	88°F	87°F	86°F
Average outside temperature	83°F	83°F	83°F
Maximum outside temperature	88°F	86°F	88°F
Minimum outside temperature	79°F	77°F	77°F
Precipitation	8.7in	8.1in	8.7in
Number of days of precipitation	13 jour(s) (43%)	12 jour(s) (39%)	14 jour(s) (45%)
Cloud cover	34%	34%	34%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Bengkulu in july

Dumai

	June	July	August
Average sea temperature	87°F	86°F	86°F
Minimum sea temperature	85°F	85°F	85°F
Maximum sea temperature	89°F	88°F	86°F
Average outside temperature	85°F	85°F	85°F
Maximum outside temperature	92°F	92°F	92°F
Minimum outside temperature	77°F	77°F	77°F
Precipitation	6.7in	6.8in	8.7in
Number of days of precipitation	11 jour(s) (38%)	12 jour(s) (40%)	16 jour(s) (51%)
Cloud cover	39%	40%	40%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Dumai in july

Gunungsitoli (Pulau Nias)

	June	July	August
Average sea temperature	86°F	86°F	86°F
Minimum sea temperature	86°F	84°F	84°F
Maximum sea temperature	87°F	89°F	88°F
Average outside temperature	85°F	83°F	83°F
Maximum outside temperature	86°F	85°F	85°F
Minimum outside temperature	83°F	83°F	81°F
Precipitation	10.7in	14in	13.3in
Number of days of precipitation	12 jour(s) (41%)	15 jour(s) (49%)	17 jour(s) (55%)
Cloud cover	39%	40%	43%
Our opinion	ideal swimming	ideal swimming	ideal swimming

More information on swimming in Gunungsitoli (Pulau Nias) in july

List of coastal cities on the island of Sumatra

Banda Aceh in july	ideal swimming
Bandar Lampung in july	ideal swimming
Bengkulu in july	ideal swimming
Dumai in july	ideal swimming
Gunungsitoli (Pulau Nias) in july	ideal swimming
Padang City in july	ideal swimming
Batam in july	ideal swimming
Way Kambas National Park in july	ideal swimming
Calang in july	ideal swimming
Pulau Belitung in july	ideal swimming
Pulau Rupat in july	ideal swimming
Pulau Siberut in july	ideal swimming
Way Kambas National Park in july	ideal swimming
Langsa in july	ideal swimming
Lhokseumawe in july	ideal swimming
Pariaman in july	ideal swimming
Sibolga in july	ideal swimming
Sigli in july	ideal swimming
Tanjungpinang in july	ideal swimming