INSTRUMENT / SEA TEMPERATURE
Arraial do Cabo Water Temperature
Updated Sun 15:59 (America/Sao_Paulo)
Brazil · Forecast updated Nov 8, 2026, 15:59 UTC
Current Sea Temperature
24.5°C
76.1°F
Mild water
Valid Nov 8, 2026, 15:59 (America/Sao_Paulo). Source: stored Open-Meteo marine forecast. Temperature is not a safety rating or snorkel score.
Versus this month's average
1.8°C above
The typical November average is 22.7°C (72.9°F) from the historical baseline.
Recent trend
Warming by 1.1°C
Seven-day average: 24.7°C, versus 23.7°C in the prior seven days.
What to wear
Mild water
A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Cold tolerance varies. Wind, session length, sunshine, and exertion also affect comfort; temperature alone does not describe sea conditions or replace the snorkel forecast.
Typical Sea Temperature Over the Year
In the historical baseline for Arraial do Cabo, typical monthly averages range from about 21.7°C (71.1°F) in September to 25.3°C (77.5°F) in March.
Over the past 30 days, the average sea temperature in Arraial do Cabo has been 24.4°C.
Historical baseline (full year)
Southern Hemisphere. Summer is generally December–February; winter is June–August.
Typical monthly sea-surface temperature near Arraial do Cabo, calculated from hourly observations for 2023–2025. This is not this site's forecast archive.
| Month | Typical range | Average |
|---|---|---|
| January | 22.6–25.4°C | 24.3°C / 75.7°F |
| February | 23.6–26.0°C | 24.8°C / 76.6°F |
| March | 24.8–25.8°C | 25.3°C / 77.5°F |
| April | 24.4–25.1°C | 24.6°C / 76.3°F |
| May | 23.3–23.8°C | 23.6°C / 74.5°F |
| June | 21.7–23.5°C | 22.6°C / 72.7°F |
| July | 21.4–23.0°C | 22.1°C / 71.8°F |
| August | 21.4–22.6°C | 21.8°C / 71.2°F |
| September | 21.2–22.5°C | 21.7°C / 71.1°F |
| October | 20.7–22.7°C | 21.9°C / 71.4°F |
| November | 21.9–23.8°C | 22.7°C / 72.9°F |
| December | 23.0–23.9°C | 23.5°C / 74.3°F |
Source: Open-Meteo Marine API, MeteoFrance sea-surface temperature dataset. Nearest sea grid cell (-22.96, -42.04). Each month is the mean of yearly monthly means; the range is the lowest and highest of those yearly monthly means. Open-Meteo methodology.
Water temperature by month
Each month uses the 2023–2025 baseline. The range is the lowest and highest yearly monthly mean, not an hourly extreme.
Arraial do Cabo in January
Typical January water temperature near Arraial do Cabo is 24.3°C (75.7°F), with yearly monthly means from 22.6–25.4°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: December 23.5°C · February 24.8°C.
Explore Arraial do Cabo sea temperature in January, including swim comfort and month comparisons →
Arraial do Cabo in February
Typical February water temperature near Arraial do Cabo is 24.8°C (76.6°F), with yearly monthly means from 23.6–26.0°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: January 24.3°C · March 25.3°C.
Explore Arraial do Cabo sea temperature in February, including swim comfort and month comparisons →
Arraial do Cabo in March
Typical March water temperature near Arraial do Cabo is 25.3°C (77.5°F), with yearly monthly means from 24.8–25.8°C.
Swimming and snorkeling: warm water. Most people are comfortable in swimwear or a light rash guard.
Adjacent months: February 24.8°C · April 24.6°C.
Explore Arraial do Cabo sea temperature in March, including swim comfort and month comparisons →
Arraial do Cabo in April
Typical April water temperature near Arraial do Cabo is 24.6°C (76.3°F), with yearly monthly means from 24.4–25.1°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: March 25.3°C · May 23.6°C.
Explore Arraial do Cabo sea temperature in April, including swim comfort and month comparisons →
Arraial do Cabo in May
Typical May water temperature near Arraial do Cabo is 23.6°C (74.5°F), with yearly monthly means from 23.3–23.8°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: April 24.6°C · June 22.6°C.
Explore Arraial do Cabo sea temperature in May, including swim comfort and month comparisons →
Arraial do Cabo in June
Typical June water temperature near Arraial do Cabo is 22.6°C (72.7°F), with yearly monthly means from 21.7–23.5°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: May 23.6°C · July 22.1°C.
Explore Arraial do Cabo sea temperature in June, including swim comfort and month comparisons →
Arraial do Cabo in July
Typical July water temperature near Arraial do Cabo is 22.1°C (71.8°F), with yearly monthly means from 21.4–23.0°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: June 22.6°C · August 21.8°C.
Explore Arraial do Cabo sea temperature in July, including swim comfort and month comparisons →
Arraial do Cabo in August
Typical August water temperature near Arraial do Cabo is 21.8°C (71.2°F), with yearly monthly means from 21.4–22.6°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: July 22.1°C · September 21.7°C.
Explore Arraial do Cabo sea temperature in August, including swim comfort and month comparisons →
Arraial do Cabo in September
Typical September water temperature near Arraial do Cabo is 21.7°C (71.1°F), with yearly monthly means from 21.2–22.5°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: August 21.8°C · October 21.9°C.
Explore Arraial do Cabo sea temperature in September, including swim comfort and month comparisons →
Arraial do Cabo in October
Typical October water temperature near Arraial do Cabo is 21.9°C (71.4°F), with yearly monthly means from 20.7–22.7°C.
Swimming and snorkeling: cool water. A 3 mm shorty or full wetsuit will make longer snorkels more comfortable.
Adjacent months: September 21.7°C · November 22.7°C.
Explore Arraial do Cabo sea temperature in October, including swim comfort and month comparisons →
Arraial do Cabo in November
Typical November water temperature near Arraial do Cabo is 22.7°C (72.9°F), with yearly monthly means from 21.9–23.8°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: October 21.9°C · December 23.5°C.
Explore Arraial do Cabo sea temperature in November, including swim comfort and month comparisons →
Arraial do Cabo in December
Typical December water temperature near Arraial do Cabo is 23.5°C (74.3°F), with yearly monthly means from 23.0–23.9°C.
Swimming and snorkeling: mild water. A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.
Adjacent months: November 22.7°C · January 24.3°C.
Explore Arraial do Cabo sea temperature in December, including swim comfort and month comparisons →
Forecast archive (growing)
These values come from hourly forecasts SnorkelForecast has stored. They cover only months with records and do not replace the historical baseline.
| Month | Min | Average | Max |
|---|---|---|---|
| June | 22.7°C / 72.9°F | 23.2°C / 73.8°F | 24.1°C / 75.4°F |
| July | 22.3°C / 72.1°F | 22.8°C / 73.0°F | 23.4°C / 74.1°F |
| August | 21.8°C / 71.2°F | 22.5°C / 72.5°F | 23.6°C / 74.5°F |
| September | 21.7°C / 71.1°F | 22.4°C / 72.4°F | 23.9°C / 75.0°F |
| October | 21.9°C / 71.4°F | 24.0°C / 75.2°F | 26.3°C / 79.3°F |
| November | 23.3°C / 73.9°F | 24.4°C / 75.9°F | 26.5°C / 79.7°F |
Partial coverage: 6 calendar months with records. Profile calculated from 3864 hourly forecast records across 6 monthly periods. This is a growing archive, not a long-term climate normal.
About the water at Arraial do Cabo
The 'Brazilian Caribbean' with clear water, coves and resident turtles.
- Area
- Rio de Janeiro
Arraial do Cabo Water Temperature: Common Questions
What is the water temperature in Arraial do Cabo today?
The current sea surface temperature near Arraial do Cabo is 24.5°C (76.1°F). Over the last 30 days, the average has been 24.4°C.
When is the water warmest in Arraial do Cabo?
The water is typically warmest in March, at around 25.3°C (77.5°F) in the 2023–2025 historical baseline.
When is the water coldest in Arraial do Cabo?
The water is typically coldest in September, at around 21.7°C (71.1°F) in the same historical baseline.
Can you swim in Arraial do Cabo today?
At 24.5°C, the water is usually comfortable for swimming and snorkeling.
Full Snorkeling Forecast
See how today's sea temperature, wave height, wind, and tides combine into a detailed snorkeling score for Arraial do Cabo.
View Snorkel Forecast →