Isla Grosa Island
Small Mediterranean islet near Cartagena with lighthouse
A small islet off Murcia's coast near Cartagena, Isla Grosa attracts divers and boaters for underwater rock formations, clear water and seabird colonies accessible by short boat trips.
Isla Grosa at a Glance#
About Isla Grosa#
Isla Grosa is a small rocky islet off the coast of the Region of Murcia near Cartagena, Spain, in the western Mediterranean. The islet is uninhabited and notable for its coastal cliffs and clear surrounding water.
Day visitors and boat tours commonly visit the islet for snorkeling, swimming and birdwatching; there are no permanent facilities on the island. The islet lies close to the Cartagena coastline and is reached by private boat or organized excursions.
- Recreation and access: A small uninhabited islet off the coast of Cartagena known for clear coastal waters and rock cliffs that are popular with day-boat visitors and snorkelers.
Tips for Visiting Isla Grosa#
- Take an organized boat or local excursion from Cartagena or La Manga rather than attempting to land independently, and confirm with the operator whether landings or swimming are allowed that day as the islet is protected.
- Visit early in the morning when sea conditions are calmer and visibility for snorkeling is best; respect bird‑nesting zones and stay to marked landing areas to avoid disturbing wildlife.
Best Time to Visit Isla Grosa#
Visit Isla Grosa in spring-early autumn for the best combination of warm weather, calmer seas and fewer crowds.
Weather & Climate near Isla Grosa#
Subtropical climate with hot summers (peaking in August) and cool winters (coldest in January). Temperatures range from 7°C to 30°C. Semi-arid with limited rainfall with a pronounced dry season.
| Month | Comfort | Temp | Feels | Rain | Sky | Humidity | Wind | UV | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | Excellent | 7° - 16° | 12° | 24 mm | some cloud | 75% | 3.9 m/s | 0.4 low | 9.8h |
| February | Excellent | 8° - 17° | 13° | 24 mm | some cloud | 75% | 4.0 m/s | 0.6 moderate | 10.7h |
| March | Excellent | 10° - 19° | 14° | 25 mm | some cloud | 77% | 4.2 m/s | 1.0 moderate | 11.8h |
| April | Excellent | 12° - 20° | 16° | 23 mm | some cloud | 78% | 4.4 m/s | 1.4 high | 13.0h |
| May | Ideal | 15° - 23° | 19° | 27 mm | some cloud | 78% | 4.0 m/s | 1.8 very high | 14.0h |
| June | Ideal | 19° - 26° | 23° | 13 mm | mostly sunny | 79% | 3.9 m/s | 2.1 extreme | 14.5h |
| July | Ideal | 21° - 29° | 25° | 3 mm | clear | 79% | 3.7 m/s | 2.2 extreme | 14.3h |
| August | Ideal | 22° - 30° | 26° | 6 mm | mostly sunny | 78% | 3.5 m/s | 1.9 very high | 13.4h |
| September | Ideal | 20° - 28° | 24° | 25 mm | mostly sunny | 76% | 3.5 m/s | 1.3 high | 12.3h |
| October | Excellent | 16° - 24° | 20° | 44 mm | some cloud | 76% | 3.5 m/s | 0.8 moderate | 11.1h |
| November | Excellent | 11° - 20° | 16° | 36 mm | some cloud | 73% | 3.7 m/s | 0.5 low | 10.0h |
| December | Very Good | 8° - 17° | 13° | 25 mm | partly cloudy | 75% | 3.7 m/s | 0.3 low | 9.5h |
