Temperatures are due to hit 25 degrees today and tomorrow.
Met Eireann have forecast the high temperatures across the country today, saying it will be "warm and humid".
It was misty in places this morning - and "pouring rain" in Cork before 7am.
Sunny spells were expected in central and eastern areas.
However, it was expected to be more overcast in the West, with rainfall expected in the north west and south west of the country.
Temperatures are expected to range between 18 to 25 degrees.
The highest will be experienced in the east of the country - but showers will break out later in the day.
Tonight will be "mild and close", but some areas will be misty.
Patchy rain and drizzle will be expected in the coastal areas and temperatures will range between 13 and 15 degrees overnight.
Tomorrow will be warm and humid again to start off with highs of 25 degrees in the northeastern part of the country. Scattered outbreaks of rain are forecast for the west of the country - and thundery showers could develop.
Tomorrow night will see some rain in the eastern part of the country but these will clear overnight.
Thursday is expected to be cooler with temperatures down to 21 degrees.
It will be slightly warmer on Friday but cooler again over the weekend with the risk of showers.
Meanwhile Irish pharmacists are advising parents to be 'sun smart' and protect their children's skin when they are outside enjoying the weather.
A high factor sun screen should be applied to children - and babies less than six months old should be kept out of direct sunlight at all times.
“It takes only a few blistering sunburns during childhood to double a person’s lifetime chance of developing melanoma, the most serious form of skin cancer," the Irish Pharmacists' Union Vice-President Darragh Connolly said.
"Children don’t have to be at the pool, beach or on vacation to get too much sun. Their skin needs protection from the sun’s harmful ultraviolet rays whenever they’re outdoors. It can be very distressing for a child if they get sunburn or overexposure to the sun as it can cause pain, itchiness, blistering, headache, fever and chills.”
Pharmacists have issued the following Sun Smart guidelines for parents to keep their children safe in the sun:
* Cover Up. Children should wear a hat, a loose-fitting t-shirt and shorts/pants where possible. Sun cream alone should never be the first line of defence for sun protection.
* Wear sunglasses. A good pair of sunglasses will help shield eyes from UV radiation, which can lead to cataracts later in life. Look for sunglasses that wrap around and block as close to 100% of both UVA and UVB rays as possible.
* Stay in the shade. Whenever children are outdoors, keep them in the shade as much as possible. Keep infants under six months out of direct sun.
* Schedule outdoor time. Go outdoors in the early morning and late afternoon, when the sun is lower.
* Sun cream. Use a reputable sunscreen that complies with EU recommendations. Children should wear a sunscreen with SPF 30 or higher and UVA protection. Waterproof sunscreens should be used if children are involved in water sports or at the beach and in and out of the water. For the best protection, apply sunscreen generously 30 minutes before going outdoors and reapply liberally throughout the day. Don’t forget to protect ears, noses, lips and the tops of feet.