Boulders Beach sea temperature today: 15°C – beach water temperature, Boulders Beach, South Africa
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South Africa · Cape Town
Boulders Beach
Sea
14.7°C58.5°F
Air
–
UV
–
Get a wetsuit
⁦13–18°C⁩

Last updated ·

Today, September 13, the sea temperature at Boulders Beach is 14.7 °C (58 °F). That matches the usual average of 14.9 °C in September. Rarely comfortable for swimming.

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Climate · monthly averages

Sea temperature by month

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.

Warmest in February (17.9°C). Coldest in August (14.4°C). Rarely comfortable for swimming.

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
MonthSea · MinSea · AvgSea · MaxAir · MinAir · AvgAir · Max
January16.7°C17.6°C19.5°C18.4°C18.9°C19.3°C
February15.9°C17.9°C19.4°C18.6°C19.1°C19.4°C
March16.0°C16.7°C18.0°C17.6°C18.1°C18.5°C
April14.1°C15.2°C16.4°C15.9°C16.3°C16.8°C
May15.0°C15.6°C16.2°C15.2°C15.6°C16.1°C
June14.8°C15.3°C15.7°C14.7°C15.1°C15.6°C
July14.2°C14.6°C15.2°C13.3°C13.8°C14.3°C
August14.3°C14.4°C14.7°C13.2°C13.7°C14.3°C
September14.3°C14.9°C15.3°C13.7°C14.3°C14.9°C
October15.0°C15.5°C16.0°C15.3°C16.0°C16.6°C
November16.3°C16.5°C17.1°C16.5°C17.2°C17.6°C
December16.5°C17.8°C18.9°C17.8°C18.4°C18.8°C

About Boulders Beach

On the False Bay side of the Cape Peninsula, Boulders Beach sits within Table Mountain National Park, where roughly 3,000 endangered African penguins have colonised the coves between 540-million-year-old granite boulders since 1982. Just north, Foxy Beach offers boardwalk views over the main penguin colony with no swimming, while Seaforth Beach opens a sheltered sand strand suited to families. The Indian Ocean here warms to 18–22 °C64–72 °F from December through March, with Cape Town International airport 45 minutes by road.

Frequently asked questions

Today, September 13, the sea at Boulders Beach is 14.7 °C (58 °F)58 °F (14.7 °C) – cold, most people reach for a wetsuit. The usual September average is 14.9 °C59 °F.

No single number works for everyone, so the scale on this page is only a guide to how the water feels: below 13 °C55 °F icy, 13–18 °C55–64 °F cold, 18–23 °C64–73 °F refreshing, 23–28 °C73–82 °F pleasantly warm and above 28 °C82 °F like a bath. Right now the sea at Boulders Beach is 14.7 °C58 °F.

In November the sea at Boulders Beach (Cape Town, South Africa) averages 16.5 °C62 °F – cold, most people reach for a wetsuit. It keeps warming until February, when it peaks at 17.9 °C64 °F.

In April the sea at Boulders Beach (Cape Town, South Africa) still averages 15.2 °C59 °F – cold, most people reach for a wetsuit. It peaks in February at 17.9 °C64 °F and cools slowly from there.