The two women were out kayaking in the water near the M275 and Mountbatten Centre when they became stuck in low tide and got stuck.
Two members of the Hill Head coastguard team had to wade through hundreds of metres of thick mud to reach the pair.
Other emergency services including fire crews from Cosham and Southsea, and paramedics from the ambulance service were also on alert.
The rescue operation took two hours to complete, and luckily the two women got back to dry land safely and uninjured.
Some of the teams involved posted photos of the operation on Twitter – here is a glimpse of their role last night:
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1. Hilsea mud rescue
Paramedics from SCAS watch on as a rescue operation to reach two women stuck in mud in Hilsea is carried out. Photo: SCAS
2. Hilsea mud rescue
Emergency services including fire crews were called out Photo: Hill Head Coastguard
3. Hilsea mud rescue
Two crew members had to wade more than 200m through the thick mud Photo: Hill Head Coastguard
4. Hilsea mud rescue
A crew from the Hill Head Coastguard helping to rescue two women stuck in the mud in Hilsea Photo: Hill Head Coastguard