diff --git a/homeassistant/components/forecast_solar/__init__.py b/homeassistant/components/forecast_solar/__init__.py
index 4d996736ecf..adbe040bfbd 100644
--- a/homeassistant/components/forecast_solar/__init__.py
+++ b/homeassistant/components/forecast_solar/__init__.py
@@ -11,6 +11,7 @@ from homeassistant.components import websocket_api
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import CONF_API_KEY, CONF_LATITUDE, CONF_LONGITUDE
 from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
 
 from .const import (
@@ -32,8 +33,10 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     if not api_key:
         api_key = None
 
+    session = async_get_clientsession(hass)
     forecast = ForecastSolar(
         api_key=api_key,
+        session=session,
         latitude=entry.data[CONF_LATITUDE],
         longitude=entry.data[CONF_LONGITUDE],
         declination=entry.options[CONF_DECLINATION],