5-day weather forecast Grožnjan Oct 18, 2026

18°16° · Overcast

Weather forecast Grožnjan Sunday Oct 18, 2026: overcast, temperature from 16 °C to 18 °C.

Precipitation probability 16%. Wind up to 2.5 m/s (gusts 7.19 m/s). Air humidity 52–66%, atmospheric pressure 763–767 mm Hg, UV index up to 4.

Weather Alerts

ModerateOct 12, 07:02 PM — Oct 14, 11:59 PMTranslate with Google

Yellow wind warning

Strong, locally near gale NE wind. Maximum wind gusts 35-55 knots (65-100 km/h)

IMPACT: Although rather usual in this region, locally or potentially dangerous wind speeds are expected to produce dangerous wave conditions to small crafts. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. Mariners should pay close attention to the marine forecast and consider wind and sea conditions in planning. It is possible that some ferry lines will not operate so follow traffic information if travelling.

5 days at a glance — tap a day to open it

Sunrise 07:25
Sunset 18:15

First Quarter58% illuminated
Moonrise 15:04 · Moonset does not set today

Chart

Table

← Sat, Oct 17

Sun, Oct 18, 2026

Forecast from 16 °C to 18 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	17	17	16	16	17	17	16	16	16	16	16	17	17	18	18	18	18	18	18	18	18	17	17	17
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	100	100	100	100	100	100	100	100	100	100	100	98	96	92	97	100	100	100	100	100	100	73	81	68
Rain chance (%)	16	16	16	14	13	13	13	13	14	14	13	13	12	11	12	13	13	13	13	12	13	10	12	11

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	2.11	2.31	2.5	2.5	2.19	1.61	1.5	1.81	2.11	1.81	1.39	0.89	0.19	1.11	1.19	0.69	0.39	0.19	0.19	0.31	1.11	1.89	2.11	2
Wind gust (m/s)	7.11	5.31	5.5	6.5	7.19	5.61	6.5	4.81	7.11	4.81	4.39	3.89	0.39	4.11	6.19	3.69	0.42	0.39	0.42	0.33	6.11	6.89	6.11	6
Wind direction (°)	E 96°	E 94°	E 99°	ESE 105°	ESE 108°	ESE 111°	ESE 104°	E 96°	E 90°	E 88°	E 92°	E 86°	NW 318°	WNW 291°	WNW 288°	WNW 290°	W 280°	WSW 248°	SSW 195°	E 97°	ENE 74°	ENE 69°	ENE 70°	ENE 66°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	64	64	64	60	56	54	54	55	57	57	56	54	53	54	55	56	55	55	54	52	53	58	63	66

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	763	763	763	764	764	764	764	764	764	765	765	766	766	766	766	766	766	766	766	766	767	767	767	767

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0	0	0.3	0.9	1.8	2.5	2.9	2.7	4	4	4	4	0	0	0	0	0

Air quality & pollen

Air quality is available for the first three days only.

← Sat, Oct 17

Sun, Oct 18, 2026

Grožnjan on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →