Published by WeatherVerity
All dates and times below are local to Grytviken (Atlantic/South_Georgia).
Moderate snow
Forecast hours ahead in Grytviken, 23:00 GMT-2–23:00 GMT-2 local time: -9.3 °C · up to 100% precipitation risk · wind up to 5.6 m/s.
No complete two-hour window remains today. Tomorrow →
Calculated by WeatherVerity from the forecast data shown on this page. Underlying forecast data: Open-Meteo · Hourly retrieved: · Atlantic/South_Georgia
The first card shows the best upcoming or recommended two-hour period. The second shows the least favorable period. The full-day best, timeline and special weather windows are supporting details.
General outdoor activity · 2 consecutive hours · Atlantic/South_Georgia
Time has moved on. Refresh the page for the current recommendation. Refresh outdoor times
108 minutes · shorter than two hours
No complete two-hour window remains today.
Weather factors cover the full source interval 22:00 GMT-2–00:00 GMT-2. No minute-level score is estimated.
Tomorrow →0/100 · Very poor
Already passed
Heavy precipitation. Severe conditions are forecast. This score is not a recommendation to go outside.
Highest score over the full day · 37/100 · Already passed
Today covers the whole local day, including periods that have already passed.
00:00 is the end of the selected day.
Least favorable time outside in Grytviken on 11 Sept 2026: 03:00 GMT-2–05:00 GMT-2 local time. 0/100.
Selected period ·
Least favorable ·
Highest score over the full day ·
Now · Calculated at 22:11 GMT-2 local time
Hourly scores; gaps mean missing data. Earlier hours are faded.
Compare selected places for this local day.
77/100 · Great
0/100 · Very poor
Heavy precipitation. Severe conditions are forecast. This score is not a recommendation to go outside.
Selected two-hour window for general outdoor activity in Grytviken on 12 Sept 2026: 10:00 GMT-2–12:00 GMT-2 local time, WeatherVerity score 77/100. Least favorable time outside in Grytviken on 12 Sept 2026: 21:00 GMT-2–23:00 GMT-2 local time. 0/100.
Selected period ·
Least favorable ·
Calculated at 22:11 GMT-2 local time
Hourly scores; gaps mean missing data. Earlier hours are faded.
Compare selected places for this local day.
56/100 · Fair
33/100 · Poor
Selected two-hour window for general outdoor activity in Grytviken on 13 Sept 2026: 09:00 GMT-2–11:00 GMT-2 local time, WeatherVerity score 56/100. Least favorable time outside in Grytviken on 13 Sept 2026: 01:00 GMT-2–03:00 GMT-2 local time. 33/100.
Selected period ·
Least favorable ·
Calculated at 22:11 GMT-2 local time
Hourly scores; gaps mean missing data. Earlier hours are faded.
Compare selected places for this local day.
Best and least favorable are relative to this day. Scores describe outdoor comfort, not official warnings.
–
Outdoor Score: 31/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -9.8–-9.6 °C · Average wind: 1.3 m/s; maximum: 1.7 m/s · Precipitation risk: up to 99%
–
Outdoor Score: 29/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -10.2–-9.7 °C · Average wind: 2 m/s; maximum: 3.1 m/s · Precipitation risk: up to 98%
–
Outdoor Score: 36/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -2.7–-1.1 °C · Average wind: 3.9 m/s; maximum: 4.5 m/s · Precipitation risk: up to 98%
–
Outdoor Score: 26/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -10.1–-9.9 °C · Average wind: 3.4 m/s; maximum: 3.7 m/s · Precipitation risk: up to 100%
–
Outdoor Score: 14/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Wind reduces comfort
Temperature: -9.2–-9 °C · Average wind: 6.9 m/s; maximum: 8 m/s · Precipitation risk: up to 100%
No 3-hour period with precipitation risk at or below 20% and no precipitation codes on 11 Sept 2026.
Lowest precipitation risk over 3 hours
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Outdoor Score: 29/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -10.2–-9.7 °C · Average wind: 2 m/s; maximum: 3.1 m/s · Precipitation risk: up to 98%
No 2-hour period above 20 °C on 11 Sept 2026.
Warmest 2-hour period
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Outdoor Score: 36/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -2.7–-1.1 °C · Average wind: 3.9 m/s; maximum: 4.5 m/s · Precipitation risk: up to 98%
No 2-hour clear daylight period on 11 Sept 2026.
Best available daylight window
–
Outdoor Score: 14/100
Already passed
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Wind reduces comfort
Temperature: -9.2–-9 °C · Average wind: 6.9 m/s; maximum: 8 m/s · Precipitation risk: up to 100%
–
Outdoor Score: 63/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -5.2–-3.7 °C · Average wind: 0.8 m/s; maximum: 1.1 m/s · Precipitation risk: up to 10%
–
Outdoor Score: 75/100
Upcoming
Low precipitation risk · Temperatures outside the activity range · Light wind
Temperature: -5.9–-4.5 °C · Average wind: 1.2 m/s; maximum: 1.8 m/s · Precipitation risk: up to 10%
–
Outdoor Score: 48/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -3–-2.5 °C · Average wind: 1.2 m/s; maximum: 1.4 m/s · Precipitation risk: up to 86%
–
Outdoor Score: 22/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range
Temperature: -9–-8.2 °C · Average wind: 5.3 m/s; maximum: 5.4 m/s · Precipitation risk: up to 100%
–
Outdoor Score: 75/100
Upcoming
Low precipitation risk · Temperatures outside the activity range · Light wind
Temperature: -5.9–-5.2 °C · Average wind: 1.4 m/s; maximum: 1.8 m/s · Precipitation risk: up to 10%
–
Outdoor Score: 75/100
Upcoming
Low precipitation risk · Temperatures outside the activity range · Light wind
Temperature: -5.9–-4.5 °C · Average wind: 1.2 m/s; maximum: 1.8 m/s · Precipitation risk: up to 10%
No 2-hour period above 20 °C on 12 Sept 2026.
Warmest 2-hour period
–
Outdoor Score: 48/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -3–-2.5 °C · Average wind: 1.2 m/s; maximum: 1.4 m/s · Precipitation risk: up to 86%
No 2-hour clear daylight period on 12 Sept 2026.
Best available daylight window
–
Outdoor Score: 75/100
Upcoming
Low precipitation risk · Temperatures outside the activity range · Light wind
Temperature: -5.9–-5.2 °C · Average wind: 1.4 m/s; maximum: 1.8 m/s · Precipitation risk: up to 10%
–
Outdoor Score: 40/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -5.6–-5.4 °C · Average wind: 0.6 m/s; maximum: 0.8 m/s · Precipitation risk: up to 96%
–
Outdoor Score: 49/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -4.9–-4.6 °C · Average wind: 2.3 m/s; maximum: 2.4 m/s · Precipitation risk: up to 24%
–
Outdoor Score: 51/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -4.4–-4.2 °C · Average wind: 1.3 m/s; maximum: 1.8 m/s · Precipitation risk: up to 41%
–
Outdoor Score: 33/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -7.6–-7 °C · Average wind: 2.3 m/s; maximum: 2.4 m/s · Precipitation risk: up to 100%
–
Outdoor Score: 56/100
Upcoming
Poor conditions — best available period.
Temperatures outside the activity range · Light wind
Temperature: -5.4–-4.4 °C · Average wind: 0.9 m/s; maximum: 1.2 m/s · Precipitation risk: up to 57%
No 3-hour period with precipitation risk at or below 20% and no precipitation codes on 13 Sept 2026.
Lowest precipitation risk over 3 hours
–
Outdoor Score: 49/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -4.9–-4.6 °C · Average wind: 2.3 m/s; maximum: 2.4 m/s · Precipitation risk: up to 24%
No 2-hour period above 20 °C on 13 Sept 2026.
Warmest 2-hour period
–
Outdoor Score: 51/100
Upcoming
Poor conditions — best available period.
Precipitation may affect this activity · Temperatures outside the activity range · Light wind
Temperature: -4.4–-4.2 °C · Average wind: 1.3 m/s; maximum: 1.8 m/s · Precipitation risk: up to 41%
No 2-hour clear daylight period on 13 Sept 2026.
Best available daylight window
–
Outdoor Score: 56/100
Upcoming
Poor conditions — best available period.
Temperatures outside the activity range · Light wind
Temperature: -5.4–-4.4 °C · Average wind: 0.9 m/s; maximum: 1.2 m/s · Precipitation risk: up to 57%
Calculated by WeatherVerity from the forecast data shown on this page.
Underlying forecast data: Open-Meteo · CC BY 4.0
Hourly retrieved: · Fresh until:
Past hours are model estimates, not observations or a record of earlier forecasts.
Calculated by WeatherVerity from this forecast.
These are comfort scores, not confidence, accuracy or official warnings. Complete windows across each local day are considered; missing hours are not filled in.
Temperature and wind use both hourly endpoints. Precipitation probability applies to the hour ending at its timestamp. Window values are conservative maxima and temperature ranges, not continuous measurements.
Hourly precipitation amount, feels-like temperature, gusts and UV are not available in this forecast. Low precipitation risk does not guarantee a dry period. Clear weather codes in daylight do not measure sunshine duration.
Each hourly score combines precipitation, temperature and wind. Rain score = 100 − probability, capped at 30 when precipitation codes occur. Wind score loses 10 points per m/s above 2. Temperature loses 5 points per degree outside the activity range. Components stop at 0 and 100.
Hourly scores are averaged across the window. Thunderstorms, freezing or heavy precipitation, wind ≥15 m/s, or temperature ≥35 °C or ≤−15 °C set the whole window score to zero. These are product rules, not official warning thresholds. Favorable requires at least 70 overall and at least 50 each hour. Ties compare rain, wind and temperature components, then earliest start. Best and worst use highest and lowest scores.
Weather scores are unchanged. Among windows within two points of the highest score and in the same quality band, starts from 06:00 to before 23:00 local time are preferred; 22:00–00:00 qualifies. Then score, daylight and the earliest start break ties. Daylight is optional, including in polar night or midnight sun. The absolute daily best is always retained. Least favorable stays at the actual minimum score; only tied minima use non-overlap and distance. Overlapping windows within a two-point range are grouped; small contrast means a spread of at most five points. A whole-day “no poor periods” statement requires complete coverage, all two-hour windows at least Good (60), and no hourly score in Poor/Very poor (below 40). These are presentation rules, not changes to meteorological scores.
Today · Fri 11 Sept · Atlantic/South_Georgia
Hourly model forecast, including earlier hours; not measured observations. Source: Open-Meteo. Retrieved . Sources & method.
Local dates · Atlantic/South_Georgia
| Day | Conditions | High / Low | Precip. chance* | Precipitation | Max wind |
|---|---|---|---|---|---|
Light snow showers | -1 °C / -10 °C | 100 % | 12.3 mm | 9.6 m/s | |
Heavy snow | -3 °C / -9 °C | 100 % | 10.4 mm | 5.3 m/s | |
Moderate snow | -5 °C / -9 °C | 100 % | 7.4 mm | 2.5 m/s | |
Light snow showers | -1 °C / -6 °C | 100 % | 4.5 mm | 2.9 m/s | |
Moderate snow | 0 °C / -10 °C | 56 % | 3.5 mm | 3.3 m/s | |
Light snow | 1 °C / -2 °C | 47 % | 1.3 mm | 3.1 m/s | |
Moderate snow | 1 °C / -2 °C | 68 % | 3.4 mm | 2.9 m/s |
*Maximum precipitation probability for the day, including rain or snow. How to read these values.
WeatherVerity answer
WeatherVerity forecast for Grytviken: high -1 °C, low -10 °C. Light snow showers.
Maximum precipitation probability: 100 %. Precipitation: 12.3 mm.
Underlying forecast data: Open-Meteo · Retrieved
WeatherVerity forecast for Grytviken: high -3 °C, low -9 °C. Heavy snow.
Maximum precipitation probability: 100 %. Precipitation: 10.4 mm.
Underlying forecast data: Open-Meteo · Retrieved
Model forecasts, not measured observations. · Atlantic/South_Georgia
Traceable forecast details, without claiming observed accuracy.
forecast-receipt-method-v2 · Full methodCollecting data
Only the same provider, product, place, unit, interval and exact valid time are compared.
Current conditions are model estimates. Retrieval time tells you when we fetched the data, not when the weather model was run. Sources, units and method.