Hermanus weather in December

December in Hermanus: warm, dry, with clean air — one of the best months to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Hermanus🇿🇦 South Africa · Cape & Garden Route · Beach88
  1. 87Jan
  2. 85Feb
  3. 84Mar
  4. 81Apr
  5. 74May
  6. 66Jun
  7. 67Jul
  8. 72Aug
  9. 78Sep
  10. 82Oct
  11. 85Nov
  12. 88Dec

#1 of 12 months in Hermanus · #166 of 1413 destinations to visit in December · comfort 88/100 (tier A)

Days
25°C
Nights
16°C
Wet days
6
Sun
12.5 h
Humidity
70%
Daylight
14 h
Hermanus, South Africa
Photo: Lize Eckley · Pexels

Traveller notes on Hermanus in December

December is after the whales. The season runs roughly June to the end of November and peaks from August to October; by November the numbers are already thin, because the animals head back south to feed over the southern summer, so a December sighting is unlikely rather than merely lucky. What December gives instead is the town without the crowd the whale season brings - which regulars say is when Hermanus is at its best: the Cliff Path along the shore, and the Hemel-en-Aarde valley wineries behind it. The record: 24.5C days that feel like 26C, 16.2C nights, 6.2 precipitation days carrying 27.1mm, 12.5 hours of sun, an 18.3C sea and a 20 kph wind.
AfterTheWhales · December · 1 month ago · Read more on Tripadvisor ↗

Other months in Hermanus

Regulars are specific early in this month is genuine shoulder season, glorious sunny weather pushing into the high 20s Celsius just as likely as a day below 20 with real wind and rain, both real outcomes rather than one being the norm. Our row backs that mild, genuinely dry read, 22.5C over 13.7C nights feeling 13C, with rain light at 39.8mm across 7 days and humidity at 73 percent. Regulars are consistent this counts as one of the best windows for spotting Southern Right Whales, especially early in the month, while also running far cheaper than peak season, some places still at roughly half their high-season rates with noticeably fewer tourists. The sea sits at a cold 15.7C. The record: 11.2 hours of sun, an 18.2 kph wind and AQI 34.
ShoulderSeasonGloriousOrWindyRain · October · 1 month ago · Read more on Tripadvisor ↗
Regulars are direct that this is the wrong month for the town's main draw: the southern right whale season runs June through November, peaking in September and October, and whales are seldom seen outside that window. The advice that follows is to come for everything else instead - the Hemel-en-Aarde wine valley, the cliff path along Walker Bay, Fernkloof Reserve's hiking trails - rather than plan a trip around a sighting that won't happen. Our row backs a mild, sunny autumn, 24.3C over 15.6C nights, with 33.1mm of rain across 7.1 days and a real 17.9 kph wind. Crowds are noted as thin this time of year, an off-season quiet that suits the wine-and-walking version of a visit. The sea runs a cool 16.5C. The record: humidity 75 percent, 10.2 hours of sun and AQI 30.
GreatCliffWalkWrongMonthForWhales · March · 1 month ago · Read more on Tripadvisor ↗
November is the far end of the southern right whale season here, not the middle of it. The animals come into Walker Bay from about June to calve and mate, and by late November the mothers and calves are leaving - the calves already half the size of the adults. Whales are commonly still seen into December, but in far fewer numbers than the August to October peak, and regulars say every year differs. If you are here now, your odds improve on a boat trip or by driving round the bay to De Kelders. The weather is the easy part: 23.5C over 14.7C, 31.5mm across 4.9 precipitation days and 12.1 hours of sun. The sea stays cold at 17.3C. The record: humidity 71 percent, a 19.2 kph wind and AQI 31.
TheCalvesAreHalfGrownNow · November · 1 month ago · Read more on Tripadvisor ↗
Hermanus is the town people come to for whales and February is not the month: the season runs June to the end of November, peaking August to October with the calving peak in August. Regulars are honest that there are still whales now - Bryde's and some humpbacks - but not in numbers and not from the shore, which is the whole point of this coastline. What February offers instead is a proper Western Cape summer, and our row bears it out at 25.3C over 16.5C with 18.3mm across 4.5 precipitation days and 11.6 hours of sun. One number to plan around: the sea is 14.7C, cold enough to change what a Blue Flag beach like Grotto means in practice. The record: humidity 71 percent, an 18.7 kph wind and AQI 33.
WrongMonthForTheWhales · February · 1 month ago · Read more on Tripadvisor ↗

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Hermanus climate normals — December

Daytime high25°C / 76°F🌤 warm
Nighttime low16°C / 61°F
Feels like (high)26°C / 79°F
Sea temperature18°C / 65°F🧊 bracing
Rainfall27 mm / 1.1 in☀️ dry
Rainy days6 days
Humidity70%💧 humid
Dew point14°C / 58°F
Sunshine12.5 h/day
Daylight14.4 h
Wind20 km/h / 12 mph
Air quality (US AQI)33🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Hermanus in December

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsSouth African summer holidays, Term 4–1 (summer, year-end) break in South Africa, school holidays in 4 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Hermanus's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Best weatherHermanus's weather peaks December–February.

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Best weatherFair weatherToughest weather

What's on in Hermanus in December

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Holiday

    South African summer holidays

    15 Dec – 15 Jan · usuallySchool holidaysCrowdedBook early

    The Overberg's beach fortnight: the town roughly doubles in size, the whales have mostly gone, and the restaurants along the cliff need booking. Rates sit at their yearly high. Source ↗

What's on around the world in December →

Nearby, and something's on

Within 300 km of Hermanus — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Hermanus?

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Hermanus in December — FAQ

Is December a good time to visit Hermanus?
December in Hermanus: warm, dry, with clean air — one of the best months to visit. It ranks #1 of 12 months for Hermanus on SeasonMap's comfort score (88/100).
What is the weather like in Hermanus in December?
In December, Hermanus averages a daily high of 24.5°C and a low of 16.2°C, with about 27.1 mm of rain over roughly 6.2 rainy days.
What is the air quality in Hermanus in December?
Hermanus has a mean US Air Quality Index of about 33 in December.

Within 300 km: Cape Town's Kirstenbosch sunset concerts around 20 Nov – 31 Mar, and Stellenbosch's Festive season in the Winelands around 15 Dec – 15 Jan.