5-day weather forecast Grožnjan 17-08-2026
Weather forecast Grožnjan Monday, August 17 17.08.2026: sunny, temperature from 21 °C to 28 °C.
Precipitation probability 82%. Wind up to 7.39 m/s (gusts 11.97 m/s). Air humidity 56–90%, atmospheric pressure 756–759 mm Hg, UV index up to 6.2.
Weather Alerts
Hide alertsSevere High temperature Warning (Degree 3/4) - Slovenia / South-West
Severe High temperature Warning
High temperatures will affect the health of sensitive members of the population.
Stay in the shade at midday and in the afternoon, while intense physical effort is not recommended. Eat light food and drink enough liquids. Wear airy and light clothes.
Drinking coffee, alcohol or very sweet drinks is not recommended. If you take medication for regulating blood pressure, consult your doctor. Air conditioning should be set to a temperature that is no more than 8 °C lower than the outside temperature. Domestic animals should have enough fresh water and shade. Living premises should be aired out at night and in the morning and sufficient air circulation should be ensured. We recommend shading premises externally. Vehicles parked in the sun should be aired out thoroughly before driving.
Extreme Forestfire danger Warning (Degree 4/4) - Slovenia / South-West
Extreme Forestfire danger Warning
There is an extreme risk of forest and bush fire.
Stay very vigilant. Be ready to take action to protect yourself from a rapidly developing fire. The public are asked to exercise extreme caution in the countryside, and immediately notify emergency services on any fire.
5 days at a glance — tap a day to open it
Sunrise 06:08
Sunset 20:09
Sunset 20:09
Waxing Crescent27% illuminated
Moonrise 11:45 · Moonset 21:59
Moonrise 11:45 · Moonset 21:59
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Clear | 23 °C | 3% | 8% | 58% | 759 mm Hg | E 99° 3.81 (7.97) m/s | 0 |
| 01:00 | Clear | 23 °C | 3% | 6% | 57% | 759 mm Hg | E 79° 3.5 (7.36) m/s | 0 |
| 02:00 | Clear | 23 °C | 3% | 6% | 56% | 758 mm Hg | E 90° 3.31 (6.92) m/s | 0 |
| 03:00 | Clear | 23 °C | 3% | 8% | 56% | 758 mm Hg | E 98° 3.11 (6.5) m/s | 0 |
| 04:00 | Clear | 23 °C | 3% | 8% | 56% | 758 mm Hg | ESE 102° 3 (6.25) m/s | 0 |
| 05:00 |  Patchy rain possible | 23 °C | 20% (0.11 mm/hr) | 89% | 59% | 758 mm Hg | ESE 107° 3.61 (7.56) m/s | 0 |
| 06:00 | Patchy rain possible | 22 °C | 36% (0.4 mm/hr) | 76% | 68% | 758 mm Hg | ESE 117° 4.39 (9.25) m/s | 0 |
| 07:00 |  Sunny | 22 °C | 7% | 6% | 73% | 758 mm Hg | ESE 115° 4.89 (9.97) m/s | 0.2 |
| 08:00 | Sunny | 24 °C | 7% | 9% | 71% | 758 mm Hg | ESE 112° 4.81 (7.03) m/s | 0.7 |
| 09:00 | Sunny | 26 °C | 5% | 8% | 67% | 758 mm Hg | SE 125° 4.89 (5.92) m/s | 1.7 |
| 10:00 |  Patchy rain possible | 27 °C | 17% (0.1 mm/hr) | 70% | 65% | 758 mm Hg | SSE 155° 4.69 (5.56) m/s | 3.3 |
| 11:00 | Sunny | 28 °C | 5% | 7% | 67% | 757 mm Hg | S 188° 4.69 (5.56) m/s | 4.9 |
| 12:00 | Sunny | 28 °C | 5% | 6% | 68% | 757 mm Hg | SSW 204° 6.11 (7.22) m/s | 6.1 |
| 13:00 |  Moderate rain at times | 28 °C | 41% (0.52 mm/hr) | 82% | 67% | 757 mm Hg | SSW 208° 5.61 (7.06) m/s | 6.2 |
| 14:00 | Patchy rain possible | 28 °C | 17% (0.08 mm/hr) | 74% | 67% | 757 mm Hg | SW 226° 3.89 (5.28) m/s | 5.4 |
| 15:00 | Patchy rain possible | 27 °C | 31% (0.29 mm/hr) | 87% | 67% | 756 mm Hg | NW 315° 2.69 (3.22) m/s | 2.8 |
| 16:00 |  Light rain shower | 25 °C | 57% (1.98 mm/hr) | 50% | 74% | 757 mm Hg | S 180° 1.61 (2.14) m/s | 1.9 |
| 17:00 | Moderate rain at times | 23 °C | 82% (4.32 mm/hr) | 87% | 84% | 757 mm Hg | SSE 163° 3.39 (5.06) m/s | 0.4 |
| 18:00 | Light rain shower | 21 °C | 69% (1.33 mm/hr) | 78% | 89% | 757 mm Hg | SE 138° 7.39 (11.97) m/s | 0.1 |
| 19:00 | Light rain shower | 21 °C | 65% (1.36 mm/hr) | 64% | 87% | 757 mm Hg | SE 141° 2.5 (4.11) m/s | 0 |
| 20:00 | Light rain shower | 21 °C | 41% (0.23 mm/hr) | 87% | 86% | 757 mm Hg | SE 136° 2.81 (4.72) m/s | 0 |
| 21:00 | Patchy rain possible | 21 °C | 27% (0.07 mm/hr) | 71% | 87% | 757 mm Hg | ESE 120° 3.61 (4.83) m/s | 0 |
| 22:00 |  Light rain shower | 21 °C | 49% (0.26 mm/hr) | 100% | 90% | 758 mm Hg | ESE 117° 3.81 (5.25) m/s | 0 |
| 23:00 | Patchy rain possible | 21 °C | 25% (0.04 mm/hr) | 68% | 89% | 758 mm Hg | ESE 104° 3.61 (5.08) m/s | 0 |
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.